Listen, I'm seriously not trying to make a big deal out of the violence. That is not my intention and I can certainly move beyond it, but in my opinion it was too violent for kids under 12-13 years old. When good guys are fighting bad guys in movies of this scale there is a lot of death. My issue is that the "good guys" in this movie had moments where they enjoyed causing the death is about the only way I can think to phrase it. The vibe I got from that connected with me in a different manner than say the Avengers movie where they are defending the entire city and world from imminent destruction. Read into that what you will, but it felt more violent. A side character in the movie (who is setup with questionable characteristics and is being defined as being mostly cruel and evil) has a completely unnecessary scene where he kills 20 people. The action was cool to see, but the scene played absolutely no purpose other than to show the action of 20 deaths.
I repeat, I enjoyed it. If you like these types of movies, I would highly recommend it.