Relativity Media has snapped up domestic rights to David R. Ellis’ 3D shark thriller from Sierra Pictures and partner Incentive Filmed Entertainment.Relativity announced Tuesday that it will release the shark pic next year and will announce a new title and a specific release date shortly. Project was formerly titled “Shark Night 3D.” Pic stars Sara Paxton, Dustin Milligan, Katharine McPhee, Chris Carmack, Alyssa Diaz, Joel David Moore, Donal Logue, Sinqua Walls and Chris Zylka. Script by Jesse Studenberg and Will Hayes surrounds a group of college friends who spend a weekend at a house on the lake, only to find a shark lurking. Ellis, whose credits include “Cellular” and the first two “Final Destination” titles, helmed. Chris Briggs and Mike Fleiss produced through their NextFilms shingle and Lynette Howell via the Silverwood Films banner. Sierra sold rights to film in Canada, Australia, New Zealand, Benelux, France, Germany, the U.K., CIS and the Baltics. Relativity now has its own distrib arm after acquiring the marketing and distribution operations of Overture Films earlier this year. Sierra is a film finance, production and foreign sales company launched by Nick Meyer and Marc Schaberg in June 2009. The shark pic is the first feature produced by Sierra to secure domestic distribution. Incentive is a 2-year-old production-financing company launched by Screen Capital Intl., Aramid Entertainment Fund and WMA; current projects include “Love and Other Impossible Pursuits” at IFC, “Blue Valentine” at the Weinstein Co. and “Area 51″ at Paramount.