I've heard from somewhere that Stephenie is considering writing the next novel in the saga from Renesmee's perspective. I think she said that there where still problems that weren't resolved in Breaking Dawn. It would be a very interesting read, that's for sure.
I would read it and love it, probably, but I've had enough of Jacob. He's already been the main character and I would hate to have to continue reading about him as a main character. As a background character, fine, but not the main one. I would rather read a Leah continuation - she was just completely forgot about in Breaking Dawn after Renesmee was born. But, that's just me.