'Character' (played by an actor normally known for his comedic roles) is known by those around him as having issues, he's not living up to his potential. When (someone) dies, he's thrust into a position of responsibility and suddenly has to decide what to make of himself. He decides to fight for good and wisecracks his way into a more responsible role in life, even if he hide this from normal people as part of his secret identity.
I know I've cut the stories from the trailer to their core but am I talking about Green Lantern or Green Hornet? I don't know either but it might explain my current lack of interest in both movies.
