To the best of my knowledge, anything with concrete is moving forward more or less as we know it. We're all pretty sure there's a second ride in Piston Peak but those details are still unknown. (I said it's a 3x spinner based on a recent patent application from WDI folks who worked on Radiator Springs, but that's a guess.)
I believe the things we're talking about as being in a re-think phase (Villains Land, DCA's Pandora) are in the bidding phase or earlier. Villains has SFWMD permits, and I was told "it's a water permit not a marriage license."
With enough time and money you can change any project whenever you want. A pause before the end of bidding, and before the board of directors approves funding, I suppose, because you don't know a project's costs until bidding is in, is likely one of the last times you can change things without huge jumps in costs and delivery dates.