The Elder Scrolls Online is a new MMORPG currently being developed by Zenimax Online Studios. Taking place in the Second Era roughly 1,000 years before the events of Skyrim, you play as a hero attempting to stop the Daedric Prince Molag Bal from taking over Tamriel and recovering your soul that was taken by him. Things are also complicated by the fact that the Imperial throne has sided with the evil Prince, and now Tamriel is in an all-out war between Cyrodill and three alliances vying for control of it.
Enemy Mine: The races comprising the Ebonheart Pact are only working together because of the threat posed by their mutual enemies. Whether or not this holds true for the other factions remains unknown, though considering that traditional relationships between Orcs and Bretons and Redguards have been hostile to say the least, it seems likely.
Expy: The three main factions (Ebonheart, Aldmeri, Daggerfall) are each roughly equivalent in theme to of Dark Age Of Camelot's Midgard, Hibernia, and Albion (respectively).
Foregone Conclusion: No matter the toss-up between which faction wins the throne, the closing years of the Second Era will see the rise of Tiber Septim and the third Empire of Men, and the first truly pan-Tamrielic empire.
It's Personal: One of the reasons why Queen Ayrenn wants to take over Cyrodiil is to take revenge on Abnur Tharn, who had caused her great suffering several years ago.
Mêlée à Trois: The three playable warring factions in the game consist of the Aldmeri Dominion (Altmer, Bosmer, and Khajit), the Ebonheart Pact (Dunmer, Nords, and Argonians), and the Daggerfall Covenant (Bretons, Redguards, and Orcs).
The game's logo has the three animals which represent the factions forming this sort of circle (lion for the Daggerfall Covenant, dragon for the Ebonheart Pact and eagle for the Aldmeri Dominion). This probably shouldn't be taken as an indication of the faction's respective advantages over each other.
In the Alliance trailer, the Nord, Altmer, and Breton leaders (Representing Fighter, Mage, and Thief respectively) circle each other in the shape of the Ouroboros.
Merchant Prince: High King Emeric, leader of the Daggerfall Covenant was originally a merchant lord from High Rock.
In the recently released Alliance trailer, one part of it features a trio of Ebonheart warriors fighting a group of zombie werewolves.
Player Versus Player: Players will be able to fight one another in battles for keeps and other such fortifications, with a particularly huge arena being the Imperial City itself, with 100 v 100 battles. This isn't surprising, considering the main creative talent were behind Dark Age Of Camelot.