so in the teaser trailer Esbern talks about the events that lead up to Elder Scrolls Skyrim like the Oblivion crisis the death of High King torygg and the civil war that was to come and of course Alduin's return. Now while you are playing the game and got to this point and Esbern talks about the wall did anyone notice that he left out the "oblivion part" all he mention was the center piece,how it was made, how it can be translated and how Alduin was defeated.