I'd say it's about on par with the first, maybe a bit worse. Some parts just feel jilted. Like, Captain America will be about to fight this guy on a cliff, then it cuts to other characters and back to Captain America who is now fighting the guy on the ground. Hulk is in it for two seconds. You get to see a shitload of Iron Man suits in his chamber. One gets busted, although I swear in one scene it wasn't broken, but then in the next it was broken again. Thor seems kind of overpowered. Seems like he is a legitimate God instead of the way it was in his Ultimate story.
And not everyone makes it out alive this time!