Starting with Pluribus, Vince Gilligan has said he expects about four seasons from Pluribus. He’s also said he could probably keep going after that. So he has an idea of how things end, but it isn’t set in stone.
Also look at How I Met Your Mother, it’s clear they had an idea for an ending from the start. However the show got renewed and extended and eventually outgrew the originally planned ending. Unfortunately the finale then had to undo a bunch of things just to get that original ending.
Going back to Vince Gilligan, if you watch Better Call Saul it’s clear that the first season was shot with the idea that if it didn’t get any more seasons, it would be a decent ending. Once it was renewed it started to expand and setup where the series would end up. The result however is that season 2 has some season 1 retreads.
I mean things do change.
Starting with Pluribus, Vince Gilligan has said he expects about four seasons from Pluribus. He’s also said he could probably keep going after that. So he has an idea of how things end, but it isn’t set in stone.
Also look at How I Met Your Mother, it’s clear they had an idea for an ending from the start. However the show got renewed and extended and eventually outgrew the originally planned ending. Unfortunately the finale then had to undo a bunch of things just to get that original ending.
Going back to Vince Gilligan, if you watch Better Call Saul it’s clear that the first season was shot with the idea that if it didn’t get any more seasons, it would be a decent ending. Once it was renewed it started to expand and setup where the series would end up. The result however is that season 2 has some season 1 retreads.