just my theory. you can see at the page where ymir disappears and mikasa holding eren's head. there is a family of three, the mother with black hair is mikasa and the husband is jean base on how mikasa is the only one who is always visiting eren's grave before. and the panel after that is the old mikasa with all her family visiting eren's grave. and the next panel where mikasa died in peace wearing her beloved scarf....
soooo mikasa really marry jean boyyy? aaa so much spoiler in the previous chapters planned by haji but i denied them...