User blog comment:Tadmonkey/Wii U/3DS Connectivity Characters and Stages Leak?/@comment-8182065-20140926155712

Without any physical evidence, I can easily just mark this one up for BS. It's just trying to appeal to people who want these characters, especially since they want Ridley and Mewtwo to be playable so badly.

The only thing I find somewhat believable would be the Smash Tower mode.