Highly doubtful. It's too soon to be optimally profitable for Blizzard. I'd assume that an announcement could be expected much later this year about an expansion.
would only correct you mutton in "Highly doubtful at present". I'm pretty sure we'll get a new expansion but it wont be the project to be announced in 5 days. We're definitely talking about a new title here.
in Korea, thats why we think its gonna be Starcraft 2. Korea has the most active Starcraft community in the world. They'll go nuts if its announced there.
or..
the exact second it is announced itll be the headline in every gaming forum on the globe