There had been some concern that Piranha 3DD, the sequel to the surprise hit Piranha 3D, wouldn't be coming to theaters.  Last month, director John Gulager said there was no need for concern, and that 3D boobs and angry fish were headed our way this year.  Now, two international posters have gone online and they don't look too bad.  I would think that including "Double the D's" in the tagline would mean focusing more on the breasts than the piranhas, but the posters are the other way around.  I guess market research shows that fish are a better selling point than boobs.  Market research is never wrong.Hit the jump to check out the posters.  The film stars Danielle Panabaker, Matt Bush, Chris Zylka, Meagan Tandy, Katrina Bowden, David Hasselhoff, Christopher Lloyd, Paul Scheer, and Gary Busey.  There is currently no release date for Piranha 3DD.Posters via Zone Fears and Bloody Disgusting.Here’s the official synopsis for Piranha 3DD:

Having awoken from their spring break extravaganza at Lake Victoria, the swarm heads upstream where they look to make a meal out of Big Wet, a local water park where when it comes to fun, nobody does it wetter! Though they came to get wet, get loaded and get some, the staff and patrons get more than they bargained for when they must face the fiercest, most bloodthirsty piranhas yet. Lead by the strong-willed, studious Maddy and her friends, Barry and Kyle, the trio must dive in and take on these man-eating creatures using every ounce of their being…but can they be stopped? Shot in 3-D and feauturing Esquire Magazine’s “2011 Sexiest Woman Alive,” Katrina Bowden and the return of Christopher Lloyd, Paul Scheer and Ving Rhames alongside fresh bait Gary Busey and David Hasselhoff, the film that took an $80 Million bite out of the box office is back for more…only this time it has double the terror and double the D!