User blog comment:Bovell/Lots of new Battlefield 3 details via Twitter, DreamHack festival, PSM3, and interview/@comment-74.248.190.106-20110627030750/@comment-1439572-20110627083215

I'd say yes...

EXPANSION PACK THAT IS SEPARATE FROM THE GAME (like Special Forces for BF2) AND DOES NOT INTERFERE WITH THE MAIN SERVERS. The same should apply to BtK, IMO.