I know nothing of the Comic. This review is of the movie only.
And what a terrific fantasy / action movie it is. The action drives this film, it's pretty much where all the important plot points happen. There's a good story arch that reveals itself later in the action, and there's lots of action.
The tech is advanced far beyond our current level of abilities. Which makes for some really cool and fun stuff. I'm not going to spoil anything.
The hero is, of course, a mild mannered and underassuming guy, who proves fallible, but capable. He has a large support system of friends who make interesting characters.
I don't want to give away too much. I wouldn't hesitate to take young kids to this movie. But I'm mostly liberal with children and movies. I don't remember any swearing and little gory blood stuff except one scene where some blood pools on purpose.