Rayman's character select icon is a lum, which is a relatively believable series icon to have.
The character design seems primarily based off of the Trophy design which has thicker eyebrows than Rayman usually has (not to this degree but you get the gist).
The splash screen doesn't have a pun because it's the unlock screen, everything from form in there to the CSS is literally on-the-nose, from font to alignment.
Most notable of all is the fact that Rayman's
character render is based on the original Rayman box art. Mewtwo's new render also has enough detail in it to look relatively believable. It does look... basic, I'll give it that.
I'm still skeptical and believe it's primarily fake. The main two reasons I don't believe this is because of balladofwindfishes' aforementioned CSS positioning argument, as well as there not being any video. But if this is a fake you can't convince me it's a terrible one, because the quality is pretty incredible and it's clear whoever made it did their research for most of the part.