I have an idea. It would be in the place of that Monsters Inc ride. Forgive me for lack of knowledge about Marvel, I never liked super heroes as a kid. If a Marvel fan could help me flesh this out, I'd be much obliged.
Basically, you were invited to tour (Marvel character's name here)'s base HQ thingy. As you board a vehicle to take you on a tour, with a video going on about "welcome, over here is so and so, over there is so and so."
A little way through, the video cuts out and is replaced with "(Marvel villain name here) has escaped from the detention level. Please be advised." As you go, you see the base becoming more and more wrecked, and (villain name here)'s shadow or whatever following you, similar to the Yeti on the Matterhorn. Only fleeting glimpses.
Eventually you see him caught again, going on about how he'll get his revenge, bla-bla-bla.
Then you make your way to the end, where you are scanned to make sure you didn't steal anything, and then you find an AA of (insert Marvel character here) saying something like "Sorry we had to cut the tour short" and also using the AI thing hat Raj or whatever her name is has.
As said, if any Marvel fans know any good characters for this, please let me know. I just came up with this in like five minutes and didn't have time for any research or anything.