I don't see the B12 surviving unless they have some extremely well thought out expansion.
When Baylor and TCU are the best teams in the league, it shows how Texas and OU have started losing recruits and aren't as dominant on a national scale as they were. The problem is that the conference isn't really a true power conference. It is a glorified regional conference, not all that different from the SWC. I'm convinced it's on the EXACT same track the SWC was on. Few people outside the footprint could tell you where any of the teams outside of OU and Texas are located. (Waco?? Ames?? Lubbock?? not exactly well known nationally.)
The lack of a TV network is killer. The B1G teams already earn more than the B12 teams and the B12 is locked in a contract through 2025 if I recall. When the B1G contract is renegotiated, they will probably double what the B12 teams get from TV. At that point it's over. The long competitive slide will continue just as we're seeing now. The reality is, there are four true power conferences, and the Big twelve isn't one of them, they just don't know it yet. Few people know that the B1G only owns 51% of the Big Ten Network. They have the option to buy the rest if they so desire. Wow, think of that, what would that do to revenues?
The future of the B12 could change if they add at least two teams, get a real TV network and bring in a significant market outside of Texas, and for crying out loud, have a CCG. I don't see that happening. What is much more likely is that someone bolts, Texas & OU, or maybe KU leaves for the B1G. I don't think there are any really big markets they can pick up easily. The Rutgers/Maryland move was a killer for TV markets and value for the B1G and the California/Oregon/Washington market is huge for the Pac 12. Where does the B12 go for that kind of clout? They league is already seen nationally as a Texas league.
There just isn't the TV money there for the long haul. They were critically wounded by the SEC stealing A&M, a fantastic move for the long term for the SEC. The SEC got Texas TV markets and recruiting in one fell swoop. The value that walked out the door when Missouri, A&M, Colorado and Nebraska left is incredible and simply can't be replaced. Nebraska wasn't a big TV deal, but it's a great national brand. Colorado is a reasonable TV market, gone. Missouri wasn't huge, but it was the biggest TV of the northern teams in the B12 with both KC and St. Louis. Basically, what's left is a much to regional conference with a weird addition in WVU. Very odd choice I think.
The other conferences seem capable of thinking out 50 years. The B1G 12 can't seem to think ahead 5 years. So, my prediction, B12 substantially gone by 2021.
The problem /Achilles Heel with the old SWC and the B-12 is Texas. They want everything their way and get it. They couldn't have everything their way with the PAC 12 and won't have it their way in the future either in the PAC 12, SEC, B-10, or the ACC. They also don't have the power to pull other P5 schools into the B-12 because of their bullying attitude. Take note 3 old B-8 schools left and one Texas school left the B-12 to get away from Texas that had the markets and national brands to do so. The B-12 will remain intact with Texas, Oklahoma, and the dwarfs. It is the only place Texas and Oklahoma can remain on top as the major players and where Oklahoma can balance the power of Texas and the block of Texas dwarfs voting for their agendas against Oklahoma and the rest of the dwarfs outside of Texas. If deregulation does not happen the B-12 grabs BYU and most likely Cinn or even UConn for 12 teams and a Championship Game. If they are serious bout Eastern TV markets and pass on BYU's premadonna ways, they could Triangulate WV with Cinn and UConn for NE TV's and great BB in its Northern Division with the national branding of Kansas.