Comic book superheroes have been and will continue to hit our screens riding dirty in Acura cars, following the Japanese luxury brand\'s multi-picture deal with Marvel.Captain American and Thor have already featured them and the next superhero spectacular The Avengers will have a couple of models filling the screen.Recently spotted driving on set was Iron Man/Tony Stark (Robert Downey Jr.), caught in a Acura NSX Spyder concept.While the Strategic Homeland Intervention, Enforcement, and Logistics Division aka S.H.I.E.L.D. will have this MDX at their disposal.According to the accurate-looking Monroney sticker, the S.H.I.E.L.D. MDX with the Sentinel Package comes with the same Palladium-powered titanium engine, 9-speed hyper-shift and diamond quartz brakes as Stark\'s roadster, and boasts 234/304 mpg city/highway.An aerial drone is stored away in a briefcase in the back, the steering wheel has a palm-scan ID, and it also comes with a cloaking device - an invisio-shield exo-system wave modifier to be exact.Other cool features include a bulletproof body, retracting repulsor canon, and advanced targeting system.Running the car won\'t come cheap as Palladium fuel costs $448/oz. But that won\'t be a concern to most as the MDX with special tactical packages is priced at almost $6m.