I did some youtube comment section research on video's trying to predict new rides, and yeah, I know the youtube comments section is the toilet of the internet, but try to bear with me...
Someone in the comments said that she was a ride op who has some sort of connection (how strong of one, I have no idea) with the marketing team, and she said we were supposed to get a water park ride this year, I believe she said something about a water coaster.
But something is off, if it was a waterpark addition, why would Jeffery post pics of survey markers on the quarry walls? Maybe those markers have something to do with a 25th anniversary nighttime show, and that post about the 4 rides with names relating to water could be a hint at the fact that this new ride has some major feature that deals with water...