Pros
Work with the vast library of Marvel characters. Disney perks and benefits. Some great people. Employee sales knock up to 80% off licensee samples. As part of the right teams you can attend multiple conventions if that's a thing still. Office hours can be somewhat flexible depending on your boss. Honestly if it wasn't for the Disney element it can be a very disappointing place to work, however the name Marvel goes a long way on the resume.
Cons
No access to the comics. They really don't care if you know anything about the characters or what they publish. Marvel Entertainment isn't Marvel Studios, so don't expect to work/play in that neighborhood. If you do get to work with Studios characters don't expect to do it without MASSIVE oversight. No company card. Expect to buy things yourself and then wait to be reimbursed. They don't like to provide office supplies and if you do need some and request then they will give you samples from licensees (limited quantities). Actively avoids giving credit to employees out of fear of unions. Just recently started caring about Diversity and Inclusion due to the very vocal employee minority. Human Resources is there to protect the senior level members.