This is a theory and a discussion thread
The elder scrolls six will take place five years after skyrim, the Dovakhiin is currently hunting down the last of the dragons so he is no where, you are the Savior of the Empire, your father is the current emperor, because of the thalmors influence the emperor can be any race (you have a fallout three styled character maker. . He is growing tired of the thalmor. He prepares to wipe out the thalmor but is assassinated, you are then taken to a thalmor cell to rot. You then one night here the cell open, one of your father's generals. The game revolves around you convincing all the races but high elves to band together and wipe out the thalmor. The rest of the high elves will become slaves. The end game goal will you becoming the emperor of the empire. Oh and I do think it's possible the Dwemer could come back I think it'd be interesting to find a secret island of some description.