Sure there is. But I doubt they would.
Right now, the B12-11-10-9 is about as unstable as can be. And one thing that TCU must consider is that if they indeed leave for the B12, where would the Big East look for new teams? That's right, we'd be looking at poaching teams from the B12-11-10-9...further destabilizing that conference.
On top of that, every team in that conference is publicly saying they are a cohesive unit. Privately, each would leave the conference in a New York minute if a nice deal came up.