Sora, Geno, WW Link, and Ganondorf confirmed 

A RELIABLE LEAKER (they do exist, live with it), revealed that WW Link and Ganondorf are in, and Sora and Geno are in as well.He said many things, like a Twilight Town Stage, and Dark Riku as a boss in the SSE (Apparently Link and PT fight him). The leaker's father was apparently friends with a ex-navy Nintendo employee. Reliable Source? I'd say yes. -