Well forgive me for waiting until something is officially announced to believe it is a 100% legit done deal. That's just how I see things. I do indeed believe Universal is building a third park. But if it turns out it's something else, I can't say I'm incredibly shocked given a third park has not been announced yet.
What has a bearing is whether or not there is an announced completion date.
Announced completion date = we'd better make that date or else people are angry
Unannounced completion date = we should make it by this date but if it needs to be pushed back, we can do so without a public fallout