Heh, I know I have a big ol’ wall of crazy in my head for a few characters too…
But yeah, I think Rayman definitely has a chance. Pretty sure he was decently requested in the smash ballot (which seems to be a HUGE deciding factor this time around), he had a trophy in Smash WiiU, and the whole “Mario Rabbids” thing makes me think Ubisoft and Nintendo are on good terms. Plus the dude would fit right into the world of Smash.