Didn't they already release multiple DLC/expansions for it? Yes they did! So this part is fulfilled!
Too soon you say? Didn't we see Assassin's Creed 2 only released last November, and Lo and Behold... we have Assassin's Creed 3 at E3! Hmmm... sounds like we have video game precedence for not being too soon!
I am all for knocking DAII out of the running, to better the chances of TESV making the cover, but I can't go on absolute blind faith.
EDIT: double speak removed!
One expansion =/= multiple expansions.
Plus, there's that date that came with Awakening. I bet they'll wait until then to announce something.