User blog comment:Scorpion Tank 123/Smash/@comment-24858759-20140920212454/@comment-6604133-20140921052405

It's a rumour that states you can add characters to the 3DS from the Wii U. Not a rumour that states the Wii U will get rid of Dr. Mario and replace him with Mewtwo, and add story mode. The 3DS probably can't contain all the existing game modes (Classic, All-Star, Smash Run, etc.) and also have a story mode, similar to either Brawl's or Melee's. The versions are meant to be balanced, so players of one version won't feel left out while players of the other version get bonuses.