^ Actually, my love for Medusa stems from a Spidey comic I got as a child in the '70s. Some kind of children's Easy Reader comic affiliated with the Electric Company TV show. Don't know if it's cannonical, but it's certainly how I met her.
Actually, speaking of ridiculous hair length... In it, she saves some children at the Statue of Liberty by shooting her hair up to the statue's crown and using one of the crown spikes as a pulley of sorts, the hair coming back down and catching the children. I forget if she does this from the base of the statue, which would be hundreds of feet, or if she's up on the statue somehow. But that's a lot of hair
All I'm hearing here is, "Sorry guys, there's no way Marvel can make a Guardians of the Galaxy movie work. GotG is going to ruin Marvel studios. It's the truth." Her hair is awesome in of itself, and it's going to be ridiculously awesome in live action. Her hair alone is going to make a billion dollars worldwide.
Also, Jessica Chastain would be perfect.