I'd really rather not see Power Metal, I do agree with something more like Infected Mushroom (love that band) with a more electronic/industrial feel, which would be cool. Entirely unrealistic unless JR started writing tons of songs, but you never know.
What they should do, is let Jordan Rudess and John Myung collaborate and write the whole next album, lyrics and all. THAT would be interesting and new.
Honestly, I have a feeling we're going to be getting something similar to their last two Roadrunner releases.