Cop Rock: Move over Danny Glover and Mel Gibson. A new buddy cop team is on the horizon as Madonna and Demi Moore will reportedly pair up to star in "Leda and Swan." The Warner Bros. film will be directed by Joel Schumacher and produced by Joel Silver, of "Die Hard" fame. The project was reported by Daily Variety on Monday, but news of it is being tightly guarded. Sources say production will begin in April. A spokeswomam for Silver's office at Warner Bros. declined to comment on the film Monday.