Definitely worth a watch if you have seen the previous two. The action is there and the special effects are great. Some of the new characters are cool and some are not. For example, the Juggernaught was cool and the porcupine guy isn't. Sometimes the movie feels rushed and doesn't flow very well, but it is an action flick based on a comic. What more can one expect?
I give this 7/10 because of the sometimes rushed plot and blatant product placement. It was nice to see the Juggernaught internet video get a nod.