Actually, I have read reviews by Japanese gamers on review websites, and they are just as mixed and harsh on Other M as the West is. As a matter of fact, quite a few of the reviews make mention that if you want to play a good 3D Metroid, you are much better off looking into the Metroid Prime trilogy.
I really doubt we are getting Dark Samus's laugh in this game, which is a shame. It would have easily been one of the Top 3 taunts in the whole game. We know all three taunts, and none of them utilize the laugh or appear to (her head does not shake in any of them). It is possible she has it for one of her victory animations, but I am not optimistic there either.
I forgot about that honestly that Prime just continually consumed massive amounts of phazon. It is still an interesting thought though. I imagine Dark Samus was mostly concerned with her own survival since phazon was mostly gone on Tallon IV, and she needed it to continue living. She probably burns a lot of "phazon calories" whenever she uses her phazon powers and abilities, and thus needs to constantly "eat".
According to an interview, for those curious about why Dark Samus teleports out of a portal for her entrance, she made it to Aether by range of a short range teleportation.
QUESTION: How did Dark Samus come from Tallon IV to Aether?
ANSWER: Dark Samus has the ability to "short range" warp and used this to move to Aether.
It is impressive that they referenced something very obscure about Dark Samus for her playable appearance. If only she also had her laugh.
Also, on the subject of Dark Samus warp to Aether, it is impressive that Dark Samus was able to seek out the only other planet that seemed to have been hit with a phazon meteor.
As for Dark Samus lacking "sapience" until later in Prime 2, the Pirate scans make mention of her trying to free Metroids from their captivity in Prime 2, and this was before Samus and Dark Samus battled for the first time. Empathy shows that she did possess intelligence for critical thought and self-awareness, as a Metroid herself in her previous life, she felt empathy for those captured Metroids and how it felt to be caged her entire life (the Chozo imprisoned her within the Impact Crater when she was Metroid Prime with their advanced force field).
The unusued log came from this page:
http://metroid.wikia.com/wiki/List_of_unused_Logbook_entries_in_Metroid_Prime_3:_Corruption
Lots of interesting stuff there. Apparently the Galactic Federation did have a data file on Dark Samus for one.
By "primitive" it might have been the wrong word. Nearly all life has the motivation to spread and continue its genetic material and lineage. Dark Samus on some level wanted to spread phazon throughout the galaxy not just to conquer it, but to spread the phazon "lineage".
As for Kensuke Tanabe, he said he had no intention of making sequels to Prime until he saw the 100% ending for Prime 1. It is possible although he says Dark Samus and phazon are finished that Dark Samus might be incorporated into a future title in some way due to her unexpected playable debut in Ultimate (personally I am expecting a possible "Dark Samus" mode in Prime 4 as one possibility to "bring her back" but not have to write a convoluted reason for why she is no longer dead).
However, in terms of story, I am not sure how she could be brought back.
Regardless, like you said, her inclusion in Ultimate has given her possibly an enduring legacy, Ultimate has only added 8 newcomers so far (with only three months left until the game's release), and Dark Samus managed to be among the few added.
Oh wow, there's a lot of interesting stuff there. Including that there was apparently supposed to be a huge Citadel and Space Pirate presence on Phaaze. My guess is that it was cut either due to time constraints or because you spend much of the game fighting Space Pirates, so having more in the final area would just be kind of more of the same, so it's better that Phaaze looked more organic and we got to see some more unique creatures. Might be a bit of both reasons, too.
Because of that, it's harder to say how much of these should be considered canon, unfortunately. Perhaps anything not pertaining to the Citadel itself could be considered canon. In which, we can also say definitively that Dark Samus controls Phaaze, not the other way around, as one of the logs says
"We learned that Phaaze is alive, and that, like us, it is subject to her will." Which just cements how crazy Dark Samus's rise to power is. She starts as something totally alone in the world, but later is able to bend whole literal planets to her will.
Also, whoever at Retro wrote this didn't do so without a huge smile on their face:
"The Pirates call this planet Urtraghus, meaning "Large Booty"."
Weird that Tanabe wasn't one of the people who planned Dark Samus. Given that he seems to be the one who laid the seeds for Sylux to be a major player, I would've thought he had some hand with Dark Samus. Though I'm glad it at least seems to have made an impression on him. Dark Samus may have some extra legacy after all. Especially due to her inclusion in Smash, which will have renewed interest in the character, as well as generate new interest.
Funnily enough, over a decade ago I invented my own "Dark Samus mode" in the previous games. Before Prime 3 came out, I think, I made some videos of a Machinima of sorts I planned to make, using Action Replay codes to enable the Phazon beam in Prime 1 and 2 at all times, roleplaying as Dark Samus. When I was like 9 or 10 years old. It was bad, but at least I only did like one episode. I'd link the videos, but since I wanted to use them for my upcoming video project, I went to look and couldn't find them, and it turns out that my little brother, who had access to my old YouTube account through my dad, deleted all my old videos for some reason. My dad definitely wasn't happy.
Unfortunately, it's rare that we get anything cool like that in games anymore. I remember in the Spider-Man: The Movie game, you could play through the game as Harry Osborn as the Green Goblin, and it was super fun. In Resistance: Retribution for the PSP, if you linked the game with Resistance 2 on PS3, you unlocked a whole new campaign with altered gameplay.
The most we ever get to cool different modes are ones that increase difficulty, which is really lame to me. Fusion Mode in Samus Returns is a relevant example, as you get the Fusion suit, but it also makes the game way harder. Developers don't really get creative with this stuff very often. Even cheat codes have gone out of style, mostly due to the invention of achievements and online leaderboards. I'd trade that stuff for cool cheat codes any day.
But hey, we have the Dark Samus Amiibo through Smash, so that has to unlock something in Metroid Prime 4. Worst case scenario is it's just concept art and stuff, but we'll have to wait and see.
Actually, aside from the impressive "short range" warp, Dark Samus' ability to warp was mentioned in the pirate log, Security Breach. "The Dark Hunter teleports into the base at will. Our security has proven next to useless against her."
What I'm curious about is how far Aether was. It's a rogue planet, so it's just out there drifting. UGPS J0722-0540 is a brown dwarf that is 13 light-years away from Earth. This is the closest I could find for an actual rogue planet (or star, really). That's 76.42 trillion miles. When I read the Q&A (because I was curious about how Dark Samus got off Tallon IV), I thought even a "short range" warp was ridiculous in terms of travel when compared to the Universe.
Anyway, for anyone interested, Larry Lurr did a video yesterday on analyzing Dark Samus. Someone in the comment section by the name of Jolic kainako mentioned that at the 19 second mark (it's actually 38 seconds, since the video was paused at 19 seconds with Dark Samus using z-air), Dark Samus goes from Charge Shot to dash away. I didn't see any frames indicating a roll, nor a shield to dash away. Normally, if one charges Charge Shot and then moves left or right on the analog, Samus will roll. But, Dark Samus didn't.
And now ZeRo uploaded an analysis on Dark Samus not long ago. About 33 minutes ago.
I'm sure that Retro didn't really think it through when determining how Dark Samus got to Aether, and "short range warp" was a simple and quick way to handwave the issue. A better answer would be that she stowed away with the Space Pirates like she did between Prime 2 and 3, but that would create some more questions.
Though that quote from Prime 2 is interesting, and I'm surprised I'd forgotten about it. I still interpret that the "teleportation" is really just her materializing from Phazon still, like when Samus encounters her in Torvus Bog, as opposed to her coming through some kind of portal.
If we're linking Dark Samus analysis videos, then I gotta share Doeboy's which he released today, he's been working hard on it for a while:
Thank you so much for this. I watched the whole thing and it was really well done. He made a gaff with the Echo Fighter thing, because as I pointed out some time ago, they're called "Dash Fighters" in Japan, so unless Sakurai was aware of the localized term, then it had no bearing one way or the other.
But this is actually a well-researched, well-edited, and well-done analysis. I'm going to be honest, the pros' analyses we've been seeing are pretty lazy and seem more about capitalizing on the demand for analysis of new characters rather than giving an honest and thorough breakdown.
ESAM made his video right away off the tiny amount of footage from the Direct and website that don't offer a whole lot of substance due to how little there is to analyze. He said (and then it was repeated elsewhere) that the dash attack angle was more like Samus's from previous games, which I was always skeptical of, because it looked like it was just that the other character was at a low percentage. With the more recent footage, we can see that the dash attack is just like Samus's. It's just because of how knockback is handled differently in this game that it looked different.
ZeRo's wasn't even edited. He's just going back and forth in a video player and it's really hard to watch or pay attention because he's trying to keep up with the footage, stopping and starting, making it not enjoyable to view and difficult to really listen to. If he'd edited a video together instead, we could have better visualization and organization to what he's talking about, but right now his video is a mess. But he's the biggest Smash 4 player, so I guess it doesn't matter how little effort he puts into his content.
So thanks for sharing something from a lesser-known content creator who made some better quality work.
The biggest takeaway is that it does seem that Dark Samus has a shorter/faster roll. I didn't even catch that in the gameplay we saw. It's not by a huge margin, but Doeboy put it very well in saying that it's a whole unit of human reaction time shorter than Samus's, so there is a tangible benefit. This could, again, help differentiate Dark Samus as a more aggressive and mobile character, while Samus is more of a zoner.
Also the effect of the electrical properties of attacks is well-explained. If in practice it makes Dark Samus more of a combo-based character, then this all starts to make a little more sense. But if it just makes it easier for players to DI out of combos, then it goes the opposite direction. So I'm a little worried about that. Thankfully this game will see balance updates that should hopefully improve any characters with such issues, similar to how Samus was improved in 1.1.5.
I'm hoping Dark Samus isn't
too good, but also hoping she's better than Smash 4 Samus. Because if she's too good, then people will use her just for the utility (like Bayonetta), and if she's too bad, then she won't be very viable. A nice "goldilocks" zone is what I'm hoping for.