My response:
No. Once a minor becomes emancipated, there is no necessity for a guardianship or other court proceeding in order for the minor to give consent to certain medical care, or to enter into a binding contract and do other acts, such as making a will and conveying property, that any other "adult" can enter into.
Therefore, unless there are other, lawful, grounds for breaking the contract, an emancipated minor is "stuck".
That's what "emancipation" means - - taking on "adult" responsibilities. Not as "neato-keeno" as you thought it was going to be, eh ?
IAAL