I don' know if Isayama would write a sequel but my thoughts are that the kid is mikasa's and jean's and after the new war that happens he or she discovers the tree where eren is buried and then does smth and titans come back. but i really hope not because I think shingeki doesn't need another continuation.
Edit: I thought then that it may be Mikasa's grandchild as someone said in the comments, but that doesn't make sense either bc by the time she died she probably already had grandchildren and they probably fought in the war and then much time had to pass so that the buildings were swallowed by the earth and then much time for trees to grow around the tree where eren was buried. in conclusion we will never know who that boy/girl at the end is or if they are even related to mikasa or any of the characters
I don' know if Isayama would write a sequel but my thoughts are that the kid is mikasa's and jean's and after the new war that happens he or she discovers the tree where eren is buried and then does smth and titans come back. but i really hope not because I think shingeki doesn't need another continuation.
Edit: I thought then that it may be Mikasa's grandchild as someone said in the comments, but that doesn't make sense either bc by the time she died she probably already had grandchildren and they probably fought in the war and then much time had to pass so that the buildings were swallowed by the earth and then much time for trees to grow around the tree where eren was buried. in conclusion we will never know who that boy/girl at the end is or if they are even related to mikasa or any of the characters