The tournament that decides college football's national champion may soon get significantly larger, but the conferences that control it cannot agree on how much larger. The College Football Playoff, which is the postseason bracket currently set at 12 teams, faces a December deadline to settle a format dispute that pits the Big Ten against the SEC.

What the conferences actually want

The Big Ten wants a 24-team field. The SEC wants 16 teams. Those two conferences hold a majority vote over the ACC, Big 12 and Group of Six, so their disagreement effectively freezes the process. On Monday, conference leaders and Notre Dame met virtually to review financial models projecting how much revenue additional games would generate per member school. According to sources, that call produced little conversation about what a future format would actually look like.

Why ESPN's preference complicates things

ESPN holds the current CFP television rights and reportedly favors a 20-team structure: technically a 16-team playoff with four play-in games determining the final spots in the field. Think of it as a version of the NCAA Tournament's "First Four," the opening-round games held in Dayton, Ohio, before the NCAA expanded its field. The Big Ten is not on board with that idea, sources told OutKick and Fox News.

The network's preference carries contractual weight. Any format that exceeds 14 games triggers a clause in the CFP agreement that opens television rights to competing networks. ESPN would rather continue sublicensing games to networks like TNT, keeping control of the broader deal. A 24-team bracket would generate inventory that FOX and others could bid on directly.

The SEC's contract problem

SEC commissioner Greg Sankey has pointed to a practical obstacle: the conference's existing contracts tied to its championship game, played annually at Mercedes Benz Stadium in Atlanta. Sponsors spend heavily on that event, and moving to a 24-team playoff would likely eliminate it as a standalone game. Sankey's conference wants confirmation the financial upside justifies the exit.

One idea circulating is turning conference championship weekend into a play-in round rather than eliminating it. That proposal, along with ESPN's 20-team concept, did not come up on Monday's virtual call.

What December actually decides

The deadline is ESPN's, not the committee's, giving the rights holder unusual influence over the timeline. The Big Ten has signaled it accepts only two outcomes: a 24-team playoff or keeping the field at 12. A decision within two months looks unlikely, according to sources. The 12-team playoff is only two years old.