Makes some sense, but it depends on the timing. If the rumors of the Guardians appearing in the new Avengers movie opening in 2018 are true, the GoTG characters will be locked into the contract with Uni and will therefore be unusable by Disney for parks on the east coast. I'm not sure how definite the rumor of these characters appearing in Infinity War is, but if it's true, it gives Disney an extremely small time table to act, really just between now and 2018. Of course, only if the rumors are true.