I just think that Comcast is looking down the timeline and figuring out which IP has the brighter future and remain relevant.
Wicked will have an additional film and likely spin offs and anything else they can come up with.
It's also an in-house IP with very little need for approvals from a 3rd party.
Not saying Zelda should be casted aside, but Wicked is certainly providing an alternative to what should be prioritized at the parks.