Kevin Costner filed a lawsuit against Ascendant Pictures on Tuesday, claiming the company broke an oral agreement to pay him $8 million to star in the romantic comedy “Taming Ben Taylor.”The suit filed in Superior Court alleges Costner and Ascendant reached an oral agreement in December 2004 about pay and royalties. The Beverly Hills company then pulled out of the agreement in June, according to the suit. Calls to Ascendant Pictures seeking comment late Tuesday were not immediately returned. The pic, about a grouchy, divorced man who refuses to sell his failing vineyard to the golf course next door, was never made. Costner is seeking $8 million and reimbursement of legal fees for the suit.