I doubt very much that Towers would get a ride that goes under the lake - the construction costs would most likely be too high for a decent attraction to be constructed. Plus I feel that to have a ride going under the lake (like the rollercoaster which has been suggested) could ruin the initial view of the Towers upon walking in and getting away from the Merlin upselling.
when i posted that picture, i never meant it should go under the main lake in front of the towers, but under the lake/pool the current log flume has.
going on from what i suggested, id love the idea for the station to be underground, under the lake/pond, so on the big finale when the ride goes into the tunnel into the lake/pond it doesn't come back out, making it look like riders have been "taken" to the depths
EDIT - another idea i had was going on from that newspaper report thing posted in the park, that got us all speculating about whether SW7 was going to replace the flume, remember? something about a weapon?
I'd love for the replacement to have this kind of theme, if it is to be some kind of water coaster then the cars should look like some kind of drift wood sculpted cannon, a weapon as you were. what to destroy? i dunno, some kind of sea monster protecting a huge load of treasure? for folk familiar with the Pirates of the Caribbean franchise, when i think of this cannon idea, i think of The Flying Dutchman ship from the films. http://www.flickr.com/photos/nightterror/265127771/