Well, of note, I think this might mean that Birdo is in the game. They didn't go for the giant egg Final Smash people thought there would be. In fact, they didn't use eggs at all. With an increased aspect of villainy, it might be possible that nearly every Nintendo character will have a villain in the roster, and Birdo could be one of them, perhaps the one for Yoshi. On top of that, Birdo's FS would be the one that involves eggs. I'd hope for extremely rapid-fire egg shooting.