There's nothing to finish, really.
David has his experiments and his guinea pigs, and a destination. We can assume they all met a grim fate.
Honestly if you were going to give the series a soft reboot, Isolation was the right way to do it. New character, room to breath, and a very strong earned emotional connection to the past. That scene where Amanda hears her mother's voice is fffffff... Man. That was well done. Weaver delivered the goods. The writing wasn't overblown. The actress for Amanda did great.
You don't need to close off anything with Covenant. They already torpedo the big questions at the start of Covenant. they threw out Shaw's story completely. There's nothing to carry on. I don't give a shit to see David go anywhere at this point because they chucked the complexity out of his character entirely by the time the husks that are supposed to be characters meet up with him in Covenant. He's just evil mad scientist robot. He could have been so much more. If they had kept Shaw alive, they could have really taken that relationship to some complex and interesting places. So yeah I don't see holding onto whatever Scott has planned. It's obvious he can't do this franchise anymore.
