This is assuming a lot and what I mean by giving it the benefit of the doubt. We saw a video for it back in November and they functioned in game. How the heck is it not ready if it was real?
Because that's still playtesting. They have to be 100% done to be in the presentation. No ifs, ands, or buts.
This point makes no sense. So you're saying that whoever took this video knew about these two costumes but didn't have evidence of any other costume that was released earlier? Right now, nothing for this leak has been confirmed true.
Who says they need to show anything else? That's not evidence of anything.
To add, all of the DLC is done in stages. Sakurai has alluded to this himself. They would have worked on the other 10 costumes first since those would come out first. Additionally, they will be working of the FP6 costumes before these (as we can assume these would be for FP7 and 8 at the earliest). So they are making these 6-9 months in advance. Why would they waste resources here when they still have three other sets (at most) to work on? This isn't reasonable in the slightest, so it's safe to say that, no, they probably would have seen the other Mii Fighter costumes before this.
Except these were probably CP6's first costumes anyway. You are aware it doesn't matter how long it takes to release a costume, right? All they do is license it and tie it to one specific character pack. That's the beginning and the end of it.
Nintendo has not confirmed if they will be doing additional Mii Fighter packs so give any other information the reasonable assumption is its 50/50. You can believe they will do that but it's not confirmed and could go the other way.
The reasonable assumption is 90/10 in favor of them. There's zero reason why they'd stop when they're still doing a costume for Fighter Pass 2. Also, FP6 is a bit off. That'd mean Fighter's Pass 6. Silly thing that bothered me.
They mentioned in all of these videos that they aren't the final build. The stuff isn't done when they make the video so its a moot point. Also "Weird things" never bear fruit. There have been plenty of "weird things" that people assumed meant something but didn't. More likely these things are people putting pieces that aren't there. Human brains love patterns so it will find connections that aren't there.
Where did they say it wasn't the final build in these presentations? Actual question here. Cause that's a fair point. However, it doesn't change that even if it was "Presentable", it was also bought at a time where it could've always been planned for Challenger Pack 6. The timeframe assumes a lot.
This is something interesting to note too; we don't actually know when Id Solftware talked to Nintendo specifically. Sans was 7 months ago. They were asked not till slightly before the Byleth announcement about it. That means the characters could've been asked about even as soon as September, not long before the leak came about for Cacomallow. We have no real timeframe of when the IP could be secured. It very likely was secured only for Fighter's Pass 2 stuff. The closest thing to a Doom rumor was in July 2019, which if that's as soon as they got it, that's actually... something that wouldn't be decided for outside of Fighter's Pass 2.
Here's the problem. None of the Mii Fighter costumes have leaked before, and here we have a video showing two unannounced costumes that have yet to appear in the game all the while other costumes have been released since. The more logically answer is this video was a mod or clever edit to trick people. It hasn't born fruit and likely never will. I think too often Smash bros fans will believe any little thing. This is the case here. This leaks has gotten nothing right a half a year later. It's more likely than not fake.
Verge literally leaked all of Byleth's costumes 10 minutes before. Presentations are at the same time, so he was literally leaked information, even if it's just the video itself not long before. So your claim is incorrect.
So yes, yes, they have. I still think it's likely a mod myself, mainly due to what Gwen said about it being impossible to replicate. Besides the video not being taken down as well, which is a huge red flag. The rest, not so much because we don't know enough about the timeframes either. We know Mii Costumes can take at least half a year minimum. That still matches up here. We already knew they started deciding Fighter's Pass 2. Why can't it be part of that at all? Cause of an assumption of some sorts that just cause it was leaked at one point, it magically was only meant for Byleth? That's just not how it works. Things can leak very early or very late. There's no hard timeframe for a leak alone. Timeframe has never been a strong point. Maybe it will be when we can confirm when Id Software talked to Nintendo(which is the earliest the costume could be licensed).
The only weird thing is aren't leaks usually taken down close to when the actual product comes out? Not that I think that means much, cause they seem to be taken down at random. I don't remember it being always "as soon as possible" either. I still think the video is fake cause it's not taken down in general, but I can't clinch it as it being fake when there's too little information beyond that. There's too many development factors that are severely lacking. We can't pinpoint how early it could be licensed(July might make sense... except that was a rumor of Doomguy in Smash, nothing else. It's safe to say he's not coming either. So we still don't have any real information here to pinpoint it. Just random tidbits that amount to no useful details).