Is Hulk a mutant?
... not in the same sense that he was born with or developed powers naturally like the standard Marvel explanation. Hulks more of a Captain America gone wrong.
Thought Hawkeye just got skills.
I still think it's a bit jarring, they could have set it up better IMO, that scene on the plane where they talked about their list was so blasé. Maybe in episode 1, not have the opening 'bad-guy' be a result of tech.