Pros
Marvel is a brand that basically speaks for itself so if you spin it the right way it could be great on your resumé. If you're a fanboy and/or overweight...you'll fit right in.
Cons
Honestly? The place is a joke. You'd expect Marvel to have a cool office full of creative types always looking to push the boundaries and keep the brand on the cutting edge but that couldn't be further from the truth. It looks like an insurance company on the inside...from the 80's. It's a place where creativity is stifled and the latest innovation I bore witness to was when the mailroom guys finally got the laser pointer and register(like at the grocery store) to scan product at the company sale. You had to fill out a paper form before. There's really NOT MUCH going on within the company except for the films and they are made in Hollywood, so don't expect to work on anything worth telling your next employer. Without the movies and Disney they'd likely be closing their doors...wait never mind, that happened already.