They activated every death flag. Son being told to "take care" of his father to complete his training. Surrogate daughter being asked to become part of his family. Wife asking him to save their son from himself. One of them would have been enough to give you reason to think that he'll die. All three and they're straight up beating you over the head with it.It was very obvious this would happen the moment Leia asked him to bring back their son. In that moment, I was like "dammit they're killing Han".