I would guess that Comcast has had UC working on plans for what, about five years now?
They knew they would find the land. Rides and areas could be used regardless of what skins/dressings/IPs they have. So they could be just changed if they didn't get an IP.
I imagine they have been working with the city somewhat with this, at least enough to know how tough/long any approvals would take.
I imagine access (turnpike/highway exit) and transport between parks would need to be planned early on.
I have no guess on how quick they could start nor any idea of when we could expect softs...but I imagine these boards will be more lively for years to come.