Hey a quick idea for you all to ponder this morning... *wicked grin*
A full expansion pack relased maybe 1 year from now with a 4th faction.
Hear me out. You get to play as the aggressors. This would be a faction that would be unlocked once you reached level 50, you can roll this character.
Essentially it will be the enemy faction. You would play through a story where you are working to help the villains.
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3 Races: Imperial, Demora, and Xivali (or the Malog Bal equivalent)
PVP Goals:
This faction would have to defend the throne from ANYONE conquering it. If they are in power there is NO emperor, and their goal is to stop any of the factions from gaining power. Primarily they would fight wars right around the imperial city, however if a faction is growing in power, they may try to do an expedition to take them down to keep the balance of power such that no one could win. - Although perhaps the 3 alliances would put aside their differences long enough to team up and over power the 4th faction, then resume normal battle.
PVE: Give the folks what they wanted: explore any realm. Most NPC's will not treat you friendly (and still you can't see other faction players) but you can be sent on a variety of missions to spread chaos and dissent throughout all Tamriel. So you can explore the entire land mass, and the opposing force will have awesome missions to combat the forces of good.
Styles: Introduce new armor and weapon styles.
Class: Implement a new "evil" themed class only playable for faction #4.
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Any thoughts? I've played a lot of Elder Scrolls, so I know this would be branching off from the direction a lot of the series goes, but I think it would be a super fun expansion, that would also be "optional" for people who aren't interested in going down that route.