This isn't a troll thread, and I don't think this is necessarily a new character. But I noticed Mr. Saturn isn't adjacent to any Mother characters on the big Smash wallpaper. Lucas is sort of nearby, but he's not very close. I bring this up because the only objects of interest on the wallpaper are the characters themselves and their related helpers (Popo/Nana, Olimar and Pikmin, etc.) with the exception of Mr. Saturn.
Again, I don't think it's necessarily evidence that Mr. Saturn is going to be a character, but there's no Assist Trophies or items on the image...
Again, I don't think it's necessarily evidence that Mr. Saturn is going to be a character, but there's no Assist Trophies or items on the image...