For years, American football fans who want to spend Sunday afternoon flipping through games in different cities have had to shell out for the National Football League-bsp-bb-link>’s Sunday Ticket broadcast package.

That might soon change.

The subscription package, which exclusively carries out-of-market games that aren’t broadcast on local CBS and Fox channels, is at the heart of a multibillion-dollar antitrust case headed to trial in Los Angeles on Wednesday.

Football fans who sued nine years ago claim that the NFL teams and DirecTV-bsp-bb-link> conspired to maintain an illegal monopoly on all out-of-market Sunday afternoon games. The arrangement allegedly allowed …