So I'll throw my two cents in on Rayman.
First, I know some people will think this is real because there are videos. Just because there are stills, even inside the game, doesn't mean the character is real. We didn't see any gameplay or even the announcer say his name. Everything we've seen so far could be made in photoshop.
It wouldn't be the first time someone has done this. I say wait until there is actual gameplay. That's MUCH harder to fake.
For my personal opinion: you all know it. My issue with adding Rayman is it makes the game feel more like MUGAN and less like Smash Bros. Smash Bros has always taken pride in being selective with its characters. Even with the third party characters, Sakurai had been restritive on them, in general, which made them feel special. Having Rayman seems more like a cooperate thing to do and makes it feel less interesting. Character like Mega Man and Sonic feel awesome because it's a rare occasion. Nintendo could easily add a ton of Sonic characters if they wanted to, and the demand is there. But they don't because, by being restrictive, it makes having Sonic feel special, rather than just another characters. And that's what Rayman would be. Just another character. In the same vein, I feel there are better choices without the legal hassle (for instance, Sonic stages are banned in offical streams because Nintendo doesn't own the music). They could have a Rhythm Heaven character, or maybe an Inkling to promote the new game. Or a veteran like Wolf (who has a lot of request, actually). Or even King K Rool, who a lot of people wanted and would likely buy. But Rayman goes by the logic of "We have to have more third party characters because they sell," which I think it gets in the way of what makes the third party characters interesting and what will keep people interested in purchasing them. Having a ton of them is lame, but having a few is cool. For those of you who keep track of what I post, this is what Diminishing Marginal Utility is. It's the concept of "There is too much of a good thing."
As an aside, I do feel like the abundance of Mario, Pokemon and Fire Emblem content drains on the game too. Brawl's roster as awesome because it was spread out. You had additions for a lot of different series. Smash 4 doesn't feel like that as much.
I wont say if it's real or not and just wait and see. One thing to keep in mind is Sakurai has said they don't have any plans for other characters and that Mewtwo is a test. Unless he was lying, Rayman would have had to be made in the last month or two (Sakurai was saying this into January). He also implied it takes a while to make a character and Mewtwo is made from scratch. It doesn't mean there couldn't have been another character. It just sheds some doubt.
Anyway, carry on.
