Question: Some valid reason Mystique dies early? Did Jennifer Lawrence get tired of playing her and wanted out?
Question: When the soldiers were taking the mutants to the containment center by the train, Kurt shouts towards the soldiers "Your kid was right about us. We could help you." What does he mean "your kid"? (01:26:45)
Chosen answer: Four minutes earlier, one of the MCU soldiers walks past Kurt and says to him "My kid used to be a fan" (of the X-Men). So later on, Kurt yells to the same soldier "Your kid was right about us. We could help you!", meaning that he and the other mutants can be trusted to help them fight the D'Bari attackers.
Question: Did Raven ever love Charles? They seemingly teased something like this in First Class so I'm merely curious.
Answer: Yes, during the events of First Class it is clear that Raven harbors romantic feelings for Charles, though Charles himself views the relationship as platonic. After meeting Erik, Raven's romantic affections seem to shift to him and Raven views Charles as an adoptive brother. This inadvertently causes something of a rivalry between Erik and Charles when Raven decides to leave with Erik. In Days of Future Past Charles' behavior seems to suggest some romantic feelings for Raven, with Charles expressing jealousy of Erik's relationship with Raven. By the time of Apocalypse, Charles and Raven once again seem to have a strictly platonic relationship which remains in place through Dark Phoenix.
Answer: Your guess is correct. Lawrence stated she was done with the franchise after "X-Men: Apocalypse." She jokingly told Simon Kinberg she would return for this film if he directed it, and to her surprise, he was serious about it and held her to it. Fans weren't very keen on her appearances either, because she was definitely phoning it in for the third film, so that may have factored into killing her off early as well.
Phaneron ★
More than one actress had played Mystique. Just because Jennifer Lawrence did not want to continue playing that role is not a reason the character would be killed off. They could easily recast another notable actress in the part. I would not be surprised if Mystique is miraculously "resurrected" in a future X-Men film with a new actress.
raywest ★
Aside from Deadpool, any new X-Men film would be a complete overhaul of the franchise since the characters will be part of the MCU now. You're not wrong about an actor wanting out to not really be a reason to kill off a character, but it doesn't preclude them from doing so either. They might have decided it wouldn't be worth the hassle of recasting the role with all the negative baggage that would come with it.
Phaneron ★
Here are some candidates I think could do it: Amanda Seyfried, Shailene Woodley, Chloe Grace Moretz. Heck maybe even Milla Jovovich-Anderson should be given an audition, what say you guys?
Rob245