Disney has plenty of lawyers and money that if they wanted a way out they would find it. I don't think they are looking for an end run though.
My hope is that with the recently approved acquisition of Fox that they can effectively give Universal other licenses that will be just as valuable to Universal as Marvel currently is to them (since they can't really expand their usage either).
Properties like Diary of a Wimpy Kid, Family Guy, Futurama, Goosebumps, Ice Age, Planet of the Apes, Simpsons, and X-Files all make more sense being owned and used by Universal/Comcast than Marvel does. I'm sure there are others.
So my dream resolution would be Disney agrees to sell some or all of those properties to Universal, at a very favorable price, in return for voiding that current Marvel contract. It makes sense from a business perspective too. Those properties would probably never get used by Disney but Universal could rake money in on them. And they fit way better in a universal park then anything Disney would ever do.
Then of course the completion of the dream would be a 5th gate, Marvel Universe, an entire park dedicated to Marvel!