After Guardians of the Galaxy came out and surprised everyone by being wildly successful Saturday Night Live did a sketch about how Marvel could sell anything, including a movie starring spinning office chairs. The aging comedy show was correct. At this point Marvel could do anything and do it well.
On paper Ant-Man is one of those ridiculous Silver Age concepts that shouldn’t work in live action. It should barely work in the comics because it seems like a gimmick, how many stories and opportunities can a hero take advantage of while being the size of an ant?
The full trailer is out now and indeed it works. They made Ant-Man awesome with just the right amount of humor as a nod to the insanity of the idea.