Well, if you're up to par on your Mundus lore or have read the Nu-Mantia Intercept, the Nerevarine's actions in stopping Dagoth Ur in Morrowind also deactivated the Heart of Lorkhan and Red Tower, helping to weaken the barriers that contained oblivion. Some speculate the Mythic Dawn to have even anticipated this event and took full advantage of it in starting the Oblivion crisis.
I think it's safe to say that all of our previous Elder Scrolls characters collectively screwed over the fourth era.
Yeah! Thats fantastic, Skyrim is basically the culmination of the entire ES series, and thus the most legendary
Esbern is that guy that's talking in the trailer, right?
Yeah, he's your mentor at the beginning of the game, I read