PlasmaTwa2
The Second-Hottest Man in my Mother's Basement
As far as a sequel to Heavy Rain, it won't happen. Quantic Dream said they don't believe in sequels and instead are working on a new IP after they finish with HR: Move Edition.
I'd rather not have a sequel to Heavy Rain. In my opinion it is gaming's equivelant to A Hollywood masterpiece like Citizen Kane; why ruin it by making an unneccesary sequel? It's not like they left any real possibility for a sequel in any of the endings, except for (as far as I know) the ending where Madison is the only one to figure everything out.
That said, I must admit that I don't know what to think of a new IP. I'd have to see it first before making a decision. I don't think Heavy Rain will ever be beaten.