I have been thinking about this for a while and i think it would be cool if after the civil war is over th winning side mounts an expidition to atmora to collect artifacts but while the player is there a mysterious portal to the plane that the dwemer disapered to but the players race cant go through the portal without going through a change so the player will hsve to choose from two new races birdmen and dwemer but when you go back through the portal to tamriel the player reverts back to their original race. In the plane that the player goes to there is a war between the dwemer who wish to build a god and destroy tamriel and the birdmen who wish to stop them you can side with either one. There would be new weapons like spears for the dwemer and the ability to fly for the birdmen although as a birdman you have to wear loght armour to fly.
Replys and suggestions are welcom
Thanks!