I still don't get how you say it's "Just a remake of X3."
X3 didn't go into space.
X3 didn't give Cyclops a major role.
X3 didn't make Jean or the Phoenix a secondary plot.
And these are all details from the trailer. The movie isn't out yet and there's plenty of room to differentiate itself more than it already has. I get that people are still cynical after how poorly X3 panned out. Believe me, I'm one of them. But everything I've seen from this movie thus far tells me that this is not the same movie. While improving on X3 is a low bar, it's one this movie is already poised to exceed.