As Talaran said, it is being made by Zenimax Online Studios. And you should give http://tamrielfoundry.com/development-faq/ a read. It tell you all the things we know of TESO as of now

Agreed with this. And as to the concerns regarding "TESO being like WoW", I can, after two-and-a-half years' experience say that -very- little of the aspects TESO features are directly derived from WoW.
The monster AI is planned to be pretty much similar to that of earlier TES games, most notably Skyrim.
You do have a hotbar system like WoW, yes, but the amount of buttons is much smaller, and reminds me much more of the quickbar slots in earlier TES games; The only difference to the latter is that you don't need to separately activate them with your mouse to use.
Ducking, blocking and sprinting are all player-defined movements, which means the game system does not decide whether or not you are hit or you dodge; You do that yourself.
Combat focuses on Stamina management, unlike WoW. The better you manage as a melee, the more Finesse you gain and the sooner you can unleash your "ultimate move". I believe the same goes for mages, although they will mostly focus on Magicka management.
You do not have "quest hubs" in TESO; Instead, you have a compass to direct you to nearby caves, quests, and other points of interest in the wilderness - directly derived from the earlier TES games.
That is only a small sample of the features the Tamriel Foundry Development FAQ has wrapped of the released information.