Decent watch, might watch again, but I don't feel it's a confident recommendation.
I know it's based off a (1936) vigilante hero that actually pre-dates Batman (1939), and that means there is a long, rich history there, but....I don't care. I'm not sure why it started, and I don't feel like researching it.
This movie, looks like it just lifted part of Seth Rogen's life and put a Green Hornet skin on it. I'm sure he pays some asian guy to perform martial arts for him while he parties. Jokes aside, it was nice to see Rogen hit his limit on a believable action front: which does involve someone else (in this case, Jay Chou) doing most of the work.
Rogen fits right into the role of a spoiled, obnoxious party boy, but even though he's supposed to be the funny one, Jay Chou is just as funny with Cameron Diaz putting out some humor as well.
I'm clearly not a Seth Rogen fan, and I don't think I'm a Green Hornet fan: I'm realizing I'm not even a Batmobile fan just now. I guess I'm not into cool cars, and a firefight is a firefight, having a gas gun isn't interesting.
All said and done, it's a good experience, there are just a lot of other movies, even "super" hero movies to watch before this.