Well I also hope/pray and hope some more that she will finish midnight sun. Then I also would like to see the other 3 books form Edwards POV.
As for an additional book to the series she could let Nahuel come back and trying to win over Nessie. I thought it was "wired" that is was mentioned in BD that he was staring at Nessie kind of like this will be relevant later....
idk maybe just my imagination lol.
Or the Volutri will be defeated and the Cullens would be the royals of the the vampire world something like that.
i just hope she is not done I`m not ready to leave the Cullen world