Oklahoma is ripe for plucking, but I thought I had heard that their legislature would mandate that Oklahoma and OSU would need to be be tied in any movement because they don't want OSU to get stuck in a sinking conference. If that is the case, no way the conference allows in two schools in the same small state. I think Kansas might have a similar issue and they suck at football (the real revenue driver for the conferences), plus it's a small state. My guess is if Oklahoma gets poached, they end up in the Pac 12 or the SEC goes to 16 and brings them and Oklahoma State in. I actually think that culturally, OU and OSU would fit best in the SEC if they move.
The real shit of it is at some point football revenues are going to flat line or even decrease and then the thought of having to send the Nebraska women's volleyball team to State College is going to start to look like a real head scratcher, so my guess is at some point, we'll see a re-alignment of non-revenue sports or major scheduling changes because it makes no sense for Nebraska to ship non-revenue teams halfway across the country when they can just play Kansas, K State, ISU, Oklahoma State, etc.