I would actually prefer for David's story to be finished in a series rather than in a movie for the very same reasons that were mentioned above. More screen time, more story, more development. I only do worry about the budget and quality of things. I have no idea about the budget of GOT, but knowing what a popular series it is, I can't imagine anything alien related getting the same budget as the insanely popular GOT. I hope I'm wrong though.
Also, I'd really be up for exploring the different time zones and even EU of the series. A season of AVP in the future, with marines. A season post A3 as a closed off, claustrophobic, more intimate, smaller scale story. Post A:R, a look at the new world of the more distant future. A season of David's finale and prequel stuff. I'd really be up for that if this was possible.
And here's me taking a stab at guessing the Watch part. I say animated/CGI mini series with Amanda. Have no clue about the complete run time. But knowing that people who know what's up are excited about it, I doubt it's shorter than 15 minutes, but I'd be surprised if it's anything longer than 60.
As I said, just guessing, not winding up my expectations, just having fun.
