What if, due to all of the unprotected blows to the head from Joker abusing him at the asylum, Jason develops CTE (chronic traumatic encephalopathy)? The degenerative disease that occurs from suffering from a lot of traumatic brain injuries. Sure, he’s fine during the course of the game’s events (as far as degenerative brain conditions go, at least), but what if he were to develop it down the road? A life of continued vigilantism isn’t exactly doing him any favors.
In some cases, CTE can present as Alzheimer’s. At first, Jason can easily brush off the symptoms as just being part of his PTSD. I mean, mood swings and impulsive behavior aren’t exactly unusual for him. But then he notices his memory beginning to deteriorate. He starts forgetting where he’s just placed something, then flat out forgets where things are – places they’ve always been. Then what he was doing earlier that day, or what he just said before. His mind becomes hazy, and it starts taking him longer to find simple solutions to problems and it’s difficult for him to concentrate on tasks. He doesn’t feel as sharp anymore, and he picks up on the gradual change in his personality over time. He has no other choice than to eventually give up his crusade against crime, and with that comes an emptiness. A lack of purpose. It feels as if his sense of self – the small shred of Jason Todd that he’s managed to regain after his confrontation with Bruce – is slipping through his fingers. He so desperately tries to cling onto whatever he has left, but knows he’s failing, and he’s absolutely terrified. Because he knows that all his hard work, all his battles with himself in order to reach a catharsis and finally feel a bit like himself again, may have been for nothing. He’s stricken with an overwhelming fear that, someday in future, he might not even know who he is anymore. But the worst part – the part that’s almost nauseating to him – is the idea that the Joker would inevitably win. Unintentionally, he will have stripped him of absolutely everything all over again, indefinitely.