I know anyone can sue anyone, but does Nebraska have a strong legal case against the big 10 for stopping football in 2020? Breach of contract?1) Don't think it's simple to switch conferences. The Big 10 would likely sue Nebraska if they tried to join the Big 12 even for one season. But these are truly unique times; I would say everything is on the table. And at the moment the NCAA has never appeared to be more impotent
2) As for Big 10 vs Big 12, I hadn't looked it up but it's not surprising. There were reasons that Nebraska and Colorado bolted from the Big 12 to begin with, such as UT not sharing revenue from the Longhorn Network
3) When you speak about a perpetual revenue stream - that stream dwindles to a brook in a multiyear shutdown. It's likely that most if not all Big Ten schools could absorb a one year shutdown and resume operations. What gives me pause and what may be a factor in an attempt by Nebraska to jump ship is the question of how long the shutdown lasts. Nebraska had total expenses of $81M in 2019, versus revenue of $122M. Some of their operating costs go away in a shutdown - no travel costs, no players are getting injured - but much doesn't. Let's say half of the expense remains and the Big Ten shutdown lasts at least two years. Can the University of Nebraska absorb $82M in expenses without television revenue and ticket sales? Maybe. But can they be sure that it comes back in two years? And how does a football team recruit players over such a shutdown? The problem is that there is absolutely no guarantee that the Big Ten or PAC-12 resumes football in 2021, because there are no decided factors that allow for a return.