Having said that I think it's fake. Dr. Mario isn't with the rest of the Mario cast and neither is Dark Pitt/Pittoo or Lucina. Unless they are putting all the clones on the bottom?
And why would Yoshi be placed between Bowser and Rosalina when he belongs to the Yoshi series?
And it's super believable. I still think there's some accuracy with some of the characters, though I hate the fake DLC options. Wolf can remain dead in favor of a LoZ character.
Before the release of Brawl a roster was leaked and everyone called it fake, soon after to be disappointed when realizing it's real. Nintendo has been clone crazy lately (Mario Kart 8) so I would not be shocked to see the return of Doc Mario as well as Dark Pit (this is such a reach though ).