My 2 cents:
Right now I don't think we could handle working on a sequel, because we really just feel like working on something new.
That said, the sequel would be quite different from the original and involve a number of new ideas and game play concepts, so I don't think it would feel like a rehash either.
I also think it would benefit the sequel if we waited a while and came back to do it at a later point in our lives when we have a different perspective on things. (no idea when that would be) It would be interesting thematically, we could kind of challenge our old ideas.