It's wild when a park puts out a press release about the next season attraction then for whatever reason decides to cancel the project. Was there any ride that you were disappointed to see canceled and not had an opportunity to ride? My list includes the canceled Arrow pipeline protoype proposed for alton Towers, the 700 hundred foot fish hook drop tower for the stratosphere tower in vegas, the launched 400ft 4D for Blackpool Beach, and the canceled coaster for Hershey Park.
Cedar Point DID build "banshee"... it's called "Mantis"... it was only a name-change. The color-scheme, layout & everything else is identical (well, not the sign, of course).
I don't know if it was official or not, but the Worlds-of-Adventure hyper coaster that was supposed to go up on the Wild-side of the park is kind of a dissapointment that it was never built because it looked like it would have been quite a staple at the park before it was sold (IF the proposed layout was true).
It wasn't released to the public, but WoF's racing wooden coaster VAMPIRE™ that was to go in Europa that was cancelled because CF:LP took over would have been fun. :( They already had the name trademarked and everything.
I'd have liked to have seen what the 2000 La Ronde junior woodie would have looked like... It was cancelled cause the park lost many revenues due to the 1999 employees strike. I heard the layout, etc. was done... Gravity Works would have done it and only thing left was to start construction.