The events of Oblivion directly created the political situation that created the Stormcloak rebellion.The end of the Septim line led to the weakening of the power of the Empire and the rise of the Thalmor.
(If you want to be really wacky, the nine mutually exclusive endings of Daggerfall all happened simultaneously. Only the Khajiit remember this. And they are on drugs so nobody takes them seriously)