Since there's always a lot left up in the air over what the protagonist of the previous game did (other than complete the main quest) the games always have a habit of somehow disposing of the prior one, so that they can't get in the way:
- After Arena, the next game implied that they were kept at the Imperial Palace while a relative unknown was sent instead.
- The Imperial Agent from Daggerfall caused the "Warp of the West;" to compensate for the distinctly contradictory multiple endings, gamesas had all happen simultaneously:
Spoiler Daggerfall, Wayrest, Sentinel, and Orsinium simultaneously crushed the other 33 kingdoms, the Empire restored order, the King of Worms became a God, the Underking got his final peaceful rest, and the Agent was killed by the massive power of the Numidium
- The Neravarine from Morrowind, similarly, was taken care of by shipping him/her off to Akavir; it was kinda twisted, since lots and lots of fans wanted to go there, so why not send their character there after the game?
I have no doubt that the Champion of Cyrodiil will be taken care of for
Skyrim, not least of which because it's been, y'know, a hundred or so years. Sure, the elves live for a few centuries, however it's been very bloody times in all three elven provinces.
And of course, as is often mentioned, there's probably the assumed path for how the Champion of Cyrodiil got taken care of:
Spoiler he/she became the new Sheogorath, and likely in time completely assumed the original's appearance and mannerisms, overcome by the power of the God of Madness. So while (s)he could still be "kicking," and in fact would certainly make an appearance in the game, it wouldn't be in a recognizable form compared to how they were when they were the protagonist.
by who? My Nerevarine could kill anyone in Cyrodiil. I like that they made Nerevarine leave the continent, otherwise my Nerevarine would of solved the Oblivion Crisis by himself.
That is, unless the Imperial Champion (
Arena) or Imperial Agent (
Daggerfall) took care of it first. After all, the Imperial Champion managed to reach the bottom of Dagoth Ur decades before the Neravarine would face off against the head of the Sixth House there.