I think that Gloomy Wood should have a horror water ride. The horror element could make it really scary. It will bring some thrill seekers missing Nemesis Sub-Terra which at the rate it is going will probably never reopen. It could be indoor or outdoor.
Sorry, I just had to say, after the demolition of The Flume, I've been thinking of the exact same thing! Alton needs a new water ride, and it needs to be a thrilling ride at that. They would obviously have to replace the current building for a bigger one if it was to be a log flume, but I don't really see that happening, so it would probably be the Duel but the kart, and tracks replaced by a lazy river ride but that is a bit too similar to rapids, so if it were to be a water ride what kind would it be?