Two months after NBC scored the rights to The Contender, a Survivor-meets-Rocky boxing show from exec producers Mark Burnett and Sylvester Stallone, bitter Burnett bidder Fox is trying to beat NBC's '05-slated series to the punch. The Next Great Champ, a similar prizefighting project with Oscar de la Hoya, is stepping into the ring for Fox this fall. ''Frankly, I don't know what The Contender is, and I don't care to know,'' says David Goldberg of Endemol USA, which is producing Champ. (NBC ducked calls for comment.) Go to your corners and come out fighting!