I do agree with Dan. While the Harry Potter series is a fantastic book and movie franchise, it was his first 'big break'. After spending ten or twenty years to get himself away from all that and to re-mold himself as Daniel, not Harry, it would be sort of counter-productive to go back to it. Not to mention that he will be much older then.

I also agree with the fact that Jo probobly isn't writing another book. I'm pretty sure I've read interviews with Jo saying she won't be writing another. She's also confirmed that Pottermore isn't another book. (EDIT: by another book, I mean the 8th Harry Potter book. I have absolutely no idea if it's an encyclopedia or what.) I know that's what alot of people have been hoping for, but quite frankly, it would seem foolish for her to write another book now that the series has officially ended.

Jo is a fantastic author though, no one else is quite like her. I look forward to seeing what else she's got up her sleeve.