That's why I always allude to the home trilogy where her first appearance and her Ver.4 Upgrade are the most prominent aspects to her character. They could always amalgamate her and give her the Zohar cannons from her Xenoblade 2 appearance, but I am generally not worried about Rex taking her spot.
If anything, Elma fans have that to worry about, and even then that's a stretch because Sakurai recently mentioned wanting to support Ultimate as much as they (Nintendo) allow him to. Hypothetically, Rex, Elma, and KOS-MOS can be playable. There just has to be a showing for each of them to even humor those odds.
Yep, the Xeno moniker is just a decoration at this point. The games barely tie together. This would be like saying that Bravely Default is a Final Fantasy game because it references the latter here and there, so there's no worrying wondering if her odds are threatened by another character or the "new game worlds" comment.
Also, I think that Mumkhar works better with his Wolverine schtick, while his Metal Face persona works better as a Final Smash and as a Classic Mode Boss. "HEY, HEY! TIME TO DIE!" anyone?
I mean you right, it'd be the most realistic way to get him playable without shrinking him down, and even then he'd probably be big enough to stick out above platforms. Which is why as the guy who made a Mumkhar thread
its a lonely, inactive place I suggested he stay out of Metal Face unless it's a final smash. But as I said, I'm content with him being in brawl mods, there's just something about an up-smash that covers half of battlefield that's hilarious and fun to me, something that would one hundred percent not fly in an actual smash game.
Mmmm, I don't think that has any bearing on KOS-MOS getting in at all. We still dont truly know if spirits mean anything for characters but right now I at least 80% believe any spirits are not getting characters so that means Rex and Pyra are most certainly out. Yeah, KOS-MOS is both but she's still a new world considering Xenosaga is a Namco property and she only gets in things because Monolith Soft and Namco both have a great relationship. If you looked at the interview I posted awhile back you could even see Harada and Takahashi together talking about everything Xeno! I think further dlc will follow the same trend of Character, stage, spirits. If Rex got in then what new spirits would be added for him? I dont know really... also Xenoblade 2 music is already in the game through the mii costume and spirits and they typically add more music for new dlc characters. I'm not saying the ABSOLUTELY CANNOT add more themes from Xenoblade 2... it would just break the current trend we have right now.
I have no problems with the current trend being broken at all, that said there's nothing saying all the future characters are passes or singles like Piranha Plant. Even then there are some notable characters to fill in on the spirits side, Amalthus, Aegaeon, Roc, Vandham, Lora, Addam, The Architect, Haze, (maybe) Hugo, the Torna crew. Xenoblade 2 only takes up three tracks out of Xenoblade's eleven total, 3-8, and there's a lot of iconic music from Xenoblade 2 not in Smash Ultimate and I'd have to say a stage is pretty easy to come up with as well, and of course there's more Mii Costumes they could make too. I think Xenoblade 2 has more than enough un-tapped potential content to be apart of a pass but I wouldn't exactly have any issues with Rex as just a fighter and not bringing anything else with him besides his classic mode and what not. But as I said, I want all the Xeno reps in and I can wait for however long as I need to, though if what Sakurai said is true with "pleasing the fans", I'm sure some Mii Costume, spirits, or assist trophies may be lined up for a promotion, but we won't know until we see it, and while we have the thing of all the current pass fighters being 100% new series (unless you really want to be technical and call Banjo and Kazooie a DK rep because Banjo debuted in Diddy Kong Racing... but that's not the point) I feel like it can change just on a whim, I'll be keeping my thoughts on that whole situation on a 50/50 chance though.
Note/Edit: When I say all Xeno-reps, I do not mean every single character, I mean more like:
Xenoblade 1: Fiora, Mumkhar (Metal Face legit appears about as many times in games as Fiora and Shulk, so... honestly you can't blame me for wanting him over some other villains later on)..
Xenoblade X: Elma
Xenoblade 2: Rex (and whatever blades he brings since there's like 4-5 he has canonically, Pyra and Mythra for sure at the very least).
Xenosaga: KOS-MOS
Xenogears: Fei (probably won't ever happen, but hey, if Fei ever gets in I'll have to stop calling Square stingy when it comes to their Smash Content... unless even he brings less than ten songs... yes I'm still upset with the lack of FF content, so much I'd welcome Sephiroth or Tifa or anyone to bring more FF content to at least equal it to Dragon Quest).
Echo Fighters: Zanza (Shulk), T-elos (KOS-MOS, unless alternate costume).
That said, the obvious meme pick is the Ardainian Soldier alongside his cross-series cousin: Gatekeeper from Fire Emblem: Three Houses.