While the reality of a Marvel Superheroes theme park in Dubai is tentative (now projected to open in 2012), Chimera Design has produced a series of illustrations depicting the concepts and general look of the park.
Most of Marvel super-heroes will have their own attractions including the Fantastic Four, Hulk, Iron Man, X-Men, Silver Surfer and of course Spiderman in what will be probably a different ride than the Spiderman ride at Universal Islands of Adventure. Also, according to a a recent post of Brady Mac Donald of the L.A Times "Off-site testing has already begun on three of the planned attractions: "Flying with Spidey", "Fantasticar" and "X-Men: Danger Room".
Take a peek at Stark Laboratories, the City of Superheroes, Crater Lake, and other rides depicted.
Link. Image: Chimera Design