WHAT IF as time goes by all the hurt, doubt and guilt eren has felt finally catches up to him and his anger becomes uncontrollable to the point where he hates blindly and the series ends with eren losing all sense of who he is, killing all his friends including mikasa and armin and then he regains his senses for long enough to realize what he’s done but it sends him into even more of a rampage and he shifts into his titan form and begins eating people, eventually turning into just a regular mindless titan