Of course Nintendo was a part of this project as well (sorry, I forgot to add that.)

I hope it's not too late to post this.

Mainly because of the four bunnies in the image having an orgy.

I have never played a Xenoblade Chronicles game but Pyra and Mythra look cool.
(FYI they have jiggle physics)

I do like the idea of Registeel, Scorpion and Aang in Smash. Registeel would make for a cool heavyweight (considering we have no steel-type pokemon in Smash yet). Scorpion would be an interesting case, because he's from a very violent game (like Doomguy) but would undoubtebly make for a cool fighter with his fire attacks. Aang sadly can't make it in, due to the fact that he originates from a cartoon, but he would be a really cool fighter to have. All his specials could each be associated with the elements from Avatar (his up-special could be associated with air).