Although that image almost tricked me (due to actually using the Japanese name for Bowser, Mega Man, and the Villager), you can tell it’s fake for two reasons:
Mewtwo hasn’t been confirmed (though when asked about it, they did not dismiss the possibility of Mewtwo returning)
I have the SSBM for the gamecube, and I must say, I really like the game. Preferred Character(s):
Link
Kirby Favorite Stage(s):
Brinstar
Venom
Green Greens Favorite item(s):
Beam Sword
Poke Ball
Motion Sensor Bomb