The series finale was of Riker and Troi on the Enterprise in their timeline using the holodeck to go back and "watch" the time period of when Tripp died and they didn't seem that upset by it either, so basically they could have had Tripp live and it wouldn't have changed anything storyline wise...
The whole thing almost made it like the whole show Enterprise was all some holo-novel or something...
THe only sequel that I would want is for Tripp to be alive and with T'Pol, and after the two times that they had a kid together maybe the third time would be the charm and the kid would make it...or at least not be erased from the timeline...