With all the action going on in GOT, it’s easy to forget about Bran and the white walkers. Only Bran truly has the power to change the past and undo our favourite character deaths and revivals and no, we don’t mean by not climbing the wall at all.
Bran, as the Three-Eyed Raven, is effectively the only person who can flit between timelines. If we have any hope of discovering that R+L= J, Bran is our closest bet to witnessing Lyanna’s rescue in the past and proving the theory all GOT fans have been waiting for. The interesting part we’ve witnessed that Bran’s actions in the past have a direct impact on those around them, in the present. So Wylis became Hodor because a psychic link was established between the Wylis of the past and the Hodor of the present.
So GOT fans can hope that maybe there is a way to stop all the events of the present from unfolding- even if the (ex) Three-Eyed Raven says that the ‘past is written and the ink is dry’. The fact that a young Ned Stark turned at what seemed to be Bran’s voice, and the Night King touched Bran proves that the lines between the psychic past and the physical present are blurred and can alter fates.
But here’s the thing: that can’t happen. Time-travel narratives are primarily of three types, and the one GOT follows is the fixed timeline, which means regardless of your actions in the past, the present will remain unchanged. Wylis becoming Hodor in the present is inevitable, we only witness his creation in the way we know him now. Any attempts to change that in the past will invariably fail, meaning that no matter how you see it, Hodor would die holding the door.
That’s why a crazy theory doing the rounds about Bran and the Mad King makes sense- apparently, the voices the Mad King heard, that made him want to ‘burn them all’ was actually Bran, going back into the past, and talking to him. Maybe GOT started way before Bran fell off the wall.