Not a lot here but:
Form 10-K has this
In addition, we license various elements based on the SimpsonsTM, including certain characters under the Fox Agreement from Twentieth Century Fox Licensing & Merchandising (“Fox”). The Fox Agreement would be terminable in the event of our breach, or in certain cases following a change of control to which Fox did not consent. If Fox were to terminate the Fox Agreement, payments due with respect to the remaining term of the Fox Agreement will continue to be due and payable as and when they would have become due and payable, except that if the breach is a result of a change of control, then 50% of such remaining payments allocated to UCDP shall be due and payable as and when they would have become due and payable.
That suggests the contract is directly between Fox and Universal. It shows the contract can be terminated by a UNi breach. But doesn't say anything about end dates.