This. (Although i'd say more like a 6/7 not 5.) Seen it twice now, it's just a leave your brain out, big action movie. But the insane praise it's got just confuses me, most of the superheroes don't really warrant there own film either IMO, Captain America, and Hulk especially. Batman makes them all look very average and stupid.
The praise is due to the fact that it nails the tone of comics perfectly. The recent Batman films have a much more serious tone. Whilst that's nice at times, it's also nice to have a film that feels like a comic book. Avengers Assemble felt like a fun comic book story that didn't take itself too seriously. I certainly wouldn't say Batman is that much better (if at all). TDKR could have been much better than it actually ended up being and one could argue that Avengers Assemble worked better as it wasn't trying to be pretentious. Anyway, there is plenty of room for Batman and the Avengers in my life...