Star Wars Return of the Jedi
Luke dies but still manages to kill the Emperor, the Rebels fail at destroying Death Star 2 Electric Boogaloo because Han dies and Leia ends captured, thus the shield generator is never destroyed and no run towards the core happens. Vader survives, crowning himself the new emperor. This immediately fixes the sequel trilogy by making it null and void
Really trying to bait Star wars fans aren’t you? By sequel trilogy do you mean the same trilogy RoTJ is in? If so, how does Vader winning over the empire complete the series?
By sequel trilogy do you mean
The Disney trilogy
how does Vader winning over the empire complete the series?
It doesn’t, that’s the whole point. Vader becomes the most powerful bad guy in the galaxy and still has a planet destroying superweapon at his service.