What I wouldn't do to have that as the roster. Same thing, but no Pichu (actually, I'd rather have Pichu then Dr. Mario, lol; sorry).
But no Krystal or EVEN Ridley makes me wonder if this is real. Ridley is only about 20% bigger then Bowser, and he seems like he could have originally been playable. I think this could be real, but I'm not sure. If Geno was suppose to be in the game, he'd be in, since he's a third party character.
And that IS THE PROBLEM, Your Hero. We don't know where it came from. If a vaild and reliable source confirms this, then we know it's real.