Ljink96 on 10 August 2018
Well, it definitely isn't impossible. I came up on a video a while ago that mentioned that Sakurai considered James Bond from Golden Eye 007 as a character in Smash. Of course Bond is not a game property. The motion sensor bomb is technically a Bond item from a game that's based off a non-gaming license. So yeah, it may not happen but I wouldn't say it's impossible.
Personally, I would want Goku in for sure, but I understand why fans would want to keep the series sacred with only gaming characters. It's a celebration of game characters and that's something special. I wouldn't want them to go the route of Tekken...because that shit was lame and strange.
