Considering how well put together Peyton Reed's Ant-Man is, it's a shock that just a few months ago a lot of people were talking about how it would be Marvel Studios' first misstep.
And I can understand–prior to having seen the movie– how one could come to such a conclusion. The character was virtually unknown to the general public–then again, so was Iron Man and the Guardians Of The Galaxy–and the production was thrown into doubt when Edgar Wright, who was originally chosen to direct, abandoned the production due to "creative differences."
The writing was on the wall, so Marvel brought in Payton Reed (Bring It On) to replace Wright. Along the way they also hired Adam McKay and Paul Rudd to build on the original screenplay by Wright and Joe Cornish.
And they did an admirable job, though there is bit of clunkiness (for instance, during the third act Ant-Man/Scott Lang (Paul Rudd) needed to find a way around the security Yellowjacket/Darren Cross (Corey Stoll) set up to protect anyone from entering Pym Industries without his say so. An elaborate plan was devised where Ant-Man has to enter through a water main, that would work only if Luis (Michael Peña) is able to turn down the water pressure. It was a thrilling scene, but wouldn't it have been a lot easier to just have Ant-Man shrink and enter in Pym's or Luis' pocket?).
Or even just walk in. He could have shrank so small that literally no one could detect him. And sure, it would have probably been much less dramatic, though it would have made a lot more sense.
Though, despite the sometimes wonky logic, Ant-Man shrinking and the micro world it opened up was the highlight of the whole movie, so any reasons that they could find for him to to do so, I'm all for.
When all is said and done, Marvel Studios has another hit–and franchise–on their hands. The action is awesome, the actors manage to make something that could have been very silly, engaging and a lot of fun.
And by the way, there are two stingers in Ant-Man, so do not leave before the credits end.