Guardians of the Galaxy (August 1, 2014)

This is such an easy one – all the Guardians of the Galaxy are former thieves, assassins, and all around criminals. They need to make up for anything that concerns a criminal act, from the usual thieving to genocidal acts. And they have to do that against the most powerful villain from the entire Marvel Cinematic Universe.

Most likely, the star is Gamora, the one who has the most burdened past – besides coming to terms with her past, she also convinces Star Lord to be more heroic and to put himself aside when it comes to saving the others.

All of the Guardians endure great pain and they save the galaxy – like true guardians should.