Looks like 2K included a little surprise at the end of the PS3 version of BioShock that unsuspecting PS3 gamers got the joy of stumbling on. Namely the first teaser trailer for BioShock 2, currently marked for a Q4 2009 release. The unlockable trailer shows a (grown up?) Little Sister holding a crafty Big Daddy plush while hopefully staring into the horizon on the Atlantic Coast. We also learn the game’s full title — BioShock 2: Sea of Dreams.

Now that the trailer cat is out of the bag, surely 2K will be releasing a quality version of it in the coming days so everyone can have a look at this lovely CGI trailer in full HD glory. (Thanks for sending this in, Dork.)