Board Thread:Manga/@comment-39492511-20200731053853/@comment-25933225-20200731090243

Probably not. First, because to "manipulate" his younger self, his youngerself needs to receive memories from the future, which wouldn't have been possible because he didn't possess the Attack Titan back then. Secondly, because it's probably the kind of thing he would have remembered, even if he didn't understand it, it would have been amongst his thoughts, etc... But we didn't have any thought related to that kind of events.