Where to start? Obviously, we've got Secret Weapon 6 coming in, but I'd get Space Mountain: Mission 2 in to fill the Black Hole tent, as I think it's a good ride and it would fit into the tent well. Obviously, there'd have to be some theming chanes, but it could work really well. I agree about the tower drop idea, as that's something Alton Towers is lacking. Personally, I'd bring in Hurakan Condor from PortAventura, as it's the best tower drop I've ever been on, and it would fit in really well with the Towers, if the right theming changes were made.