So I just finished the game with Yes man.. very cool ending.. but there must be tons of different endings besides the regulars since it shows different outcomes of other quests.. I really think theres no way in hell they can extend it with dlc now for sure which kinda svcks..

DLC are planned but you'll need to load a save from before the last quest to play them.

oh i know just liked the way in fallout 3 it extended it so there really was no permanent ending to it