You're overestimating the problem of dealing with that. It's not like it will expose the new university to liability. Whoever hires him just has to put the proper controls in place and structure the contract so that screwing around in that way will cost him. You can even put an indemnification clause in there for any employment related lawsuits against the school so that even after he is comfortable, it's more than just his future earnings he's worried about.
After that, it's just a PR issue. He's already started his public penance, and each year that goes by makes it a little easier to hire him. The only hesitancy Auburn would have would be that (i) it appears clear he can't keep up with Saban, and (ii) he probably doesn't have the personality to be a puppet (although he might be willing to try it at this point). UK might not care enough about football to take that PR hit, but otherwise would/should be happy to take him with the right contract length and buyout clause. If UM had kept Nutt another year, I'm sure they would have jumped on him, although the thought of taking another arkansas retread might have prevented that. MSU would not touch him if Dan left now, but I hope we would have been happy to take him coming off of the Slytanic. The only thing to keep UT from taking him is they believe they can get somebody like Gruden. That's a third of the schools in the SEC that would conceivably take him now or would have in the recent past. A BCS school with the right combination of (i) caring too much about football, (ii) desperation, and (iii) lack of attractive alternatives will likely pop up in the next year or two. Certainly not guaranteed to, but I would bet that if he is not picky, there will be a perennial also ran in a major conference with boosters tired of losing and ready to roll the dice.