3. Hellboy: The Ride
To capitalise on the success of the superhero movie genre (which Universal are already doing with Marvel Superhero Island in Islands of Adventure), they could make a ride in Universal Studios based on the Universal Pictures movie Hellboy. It could take the riders on a journey in to hell itself and could be similar in concept to the existing Universal Studios ride Revenge of the Mummy: The Ride. I'm picturing the queue and pre-show being some kind of archaeological dig site and the riders are thematically dragged through a portal while in a vehicle that sends them on a journey through hell. Hellboy could then appear, mixing 3D with real life motion (rather like The Amazing Adventures of Spider-Man in Islands of Adventure), and kick the asses of the demons who are inevitably attacking the riders, before bringing them to safety and leaving them with one of his witty one-liners. I can't really think of many things that would be cooler than that.