I guess that's not a bad thing as there should be a lot more content although judging by blizzards previous record you might have to own the first one to be able to play this.
Still I am looking forward to it.
I think they stated early on with SC2: WoL that each game would be a spearate game, but that youd get more out of it playing all of them (stories connected etc).
As Gorman says, likely a full game price, as they are essentially full games, albeit 3 campaigns of the same thing
Or, in a crazy world where there is peace on Earth and people actually care about Cheryl Tweedy's employment, Blizz gives the game away for free for people that own WoL!
Yer I want to live on that world please, is that the same world where tap water is actually mountain dew and multi billion dollar game studios give you free subscriptions to MMO's