you probably will never look at this again, but seriously you don't know how developing a game works. Bethesda would hire a different group of people just to work mainly on the co-op. there would be no time taken away from the single player, it would be exactly the same!!! so seriously, for everyone, there is no reason not to make a co-op for this game, they have the money and the resources, it would only take a bit more time.
EDIT: tried to reply to someone elses post, but seriously i hate arrogant ppl who think co-op would ruin the game. NO! MMO would ruin this game, not co-op. AND if you're going to compare this game to halo... seriously? HALO's a shooter game, the only reason you can compare it to this thread at all is the fact that they were able to put co-op into the main story line, though the story line for the halo series in my opinion is not as good as TES, therefore i believe it would work better in TES. You can make co-op work in a game thats meant to be for a single player.
EDIT: tried to reply to someone elses post, but seriously i hate arrogant ppl who think co-op would ruin the game. NO! MMO would ruin this game, not co-op. AND if you're going to compare this game to halo... seriously? HALO's a shooter game, the only reason you can compare it to this thread at all is the fact that they were able to put co-op into the main story line, though the story line for the halo series in my opinion is not as good as TES, therefore i believe it would work better in TES. You can make co-op work in a game thats meant to be for a single player.