It's been reported from different sources that Disney is at least considering buying out the Universal contract. Screamscape has claimed that they took it before the board. If they're willing to pay $4 billion for Marvel and then another $150 million for the distribution rights to The Avengers and Iron Man 3, I don't think they would hesitate much on buying out the Universal contract.
I don't really know what the advantage of them buying out the contract would be at this time, though. I'm sure they're probably trying to find a loophole to get something based off Iron Man or any other non-Universal characters, but with them already getting paid by Universal every year for the rights and not having to put up the expenses of ride development and operation, I don't think they'd probably think it's the best time to try to get the rights back.