I can only imagine that 2K and WWE are going to go hard next year, when the game is released for the PS4/Xbox One. This year was a bit of a 'throwaway' year, but we still got a few new and cool things.
Mania Mode is pretty sick, and allows us to play guys who haven't been in the games for years (Goldberg, Hogan, etc) and recreate cool moments. We might even see some new guys that haven't been announced yet. I think Mania is the cut-off for roster, so I'm not sure what kind of DLC we'll get... Big E, Fandango, a few others. Maybe NXT guys?