Re: The Sentinels
They are already doing Sentinels and time-travel, I think that is enough especially this is part of the X-Men movie series and out of all the Marvel movie adaptations out there, X-Men is the one that feels very realistic. I don't think they should go all out and put all the sci-fi elements as much as they can in 1 movie, it would just be too much.
This movie is inspired from the comics, but it won't be an 100% accurate adaptation of the comic-book. I think the movie will be about preventing a Sentinel dominated future but it doesn't mean, Sentinels are gonna run the world on their own. There has to be someone who is behind the Sentinels program and I don't think it should be an emotionless Artificial Intelligence.