[Update] Sorry, Rayman fans! It appears this rumor was just an elaborate hoax.
See how the culprit pulled it off in the video below.
[Original] It looks like Super Smash Bros. fans may have more to look forward to than just Mewtwo joining the roster, as Rayman has apparently been leaked as yet another forthcoming downloadable character.
A number of screenshots have popped up on the web showcasing Rayman's inclusion in the game. Here's a look at the character select screen of the 3DS version, where both he and Mewtwo are included.
If that's not enough evidence for you, here's another image.
Nintendo has yet to confirm Rayman's inclusion in the game, so we'll have to treat this as rumor for the time being. We'll be sure to keep you updated if/when the Big N or Ubisoft decide to break the silence.
In the meantime, comment below and let us know whether or not you think Rayman would make a nice addition to the Smash roster.
[Via NeoGAF]