Big superhero-movie fun comes in a small package, courtesy of Paul Rudd and company. The latest film franchise culled from Marvel’s comic-book universe packs a ton of fun into a teeny package. Its low-key charm helps glide us over trouble spots in tone and pacing. Ant-Man stars Paul Rudd as standard-sized Scott Lang, a petty thief who gets to shrink at will and cause all sorts of trouble. Ant-Man may not have the hulking clout of the Avengers, but the little bastard from Marvel’s second-tier gets the job done. The movie version benefits from not being familiar to the point of frustration. The script by Joe Cornish and the terrific Edgar Wright with a frisky polish by Rudd and Adam McKay, explains it all for you. It also leaves you wondering about the delicious experiment Wright, once slated to direct, would have made of it. Luckily, Rudd is the kind of actor you’d happily follow anywhere.