So I was thinking about Hank's theory on time after seeing Logan. It got me wondering if Apocalypse was playing with that idea. Because at the end of that movie the power of mutants became a political topic of controversy like in X1. Along with Charles and Erik having the same conversation they had in X1, which I don't think is just a call back.
I've read in an interview with Singer prior to the film's release saying that he wanted to show that Xavier was blindly optimistic and how he changes.
It seems to me that the reason why he changes his mind about teaching his students how to fight is because he realizes that Jean's "dreams" are not just dreams after meeting Apocalypse who was in her vision. Hence why he says "Oh my god" when he saw him. In addition to knowing the events of X3, he is now considering Hank's theory and decides to prepare for the worst.
I've read in an interview with Singer prior to the film's release saying that he wanted to show that Xavier was blindly optimistic and how he changes.
It seems to me that the reason why he changes his mind about teaching his students how to fight is because he realizes that Jean's "dreams" are not just dreams after meeting Apocalypse who was in her vision. Hence why he says "Oh my god" when he saw him. In addition to knowing the events of X3, he is now considering Hank's theory and decides to prepare for the worst.