While I think Avengers 1 is his best work, it still has some glaring flaws to it. The thing is shot like a tv show, the unnecessary Agent Colsen character, Cap's dorky looking costume in this, and a bit too many quips. That being said, its my favorite Marvel film still. Although I feel the reason why Joss Whedon is jumping on board with Bat Girl is because he wants to appease the SJW crowd he offended with Avengers 2 and wants their browny points/money.