Sonic Rush Adventure gave us something of a teaser with Sonic and his friends promising to return to Blaze's dimension. I personally would like to see more of Blaze's world, and Marine needs significant character development, but has potential to be a great character and sidekick to Blaze. Blaze herself could also use a back story. What are your ideas?
(I would have posted this in the Sonic Rush club, but it has been all but abandoned, it seems.)