Even by comic-book movie standards, a thief who can shrink himself to the size of an insect – as well as being able to telepathically control ants – is a totally bonkers premise for a blockbuster. As their sensational Guardians of the Galaxy proved, however, Marvel Studios isn't afraid to take left-field ideas and turn them into cinematic gold. It's a shame then, that Ant-Man is more of a mildly diverting setup for phase three of the Marvel Cinematic Universe, rather than a wholly entertaining flick that can stand on its own two legs. It's also arguably the least action-centric Marvel film to date, with barely a punch thrown or weapon fired until the final act, save for an unexpected (and highly enjoyable) scrap between the titular hero and a recognisable face. Where this idiosyncratic heist flick scores big points though, is in the comedy department. With a script worked on by Edgar Wright, Joe Cornish and Paul Rudd, it's hardly surprising to find a tongue-in-cheek tone and a healthy splattering of jokes; Michael Pena's goofy sidekick bagging the biggest laugh with an energetic monologue. On leading man duties, Rudd is eminently lovable as burglar Scott Lang – his effortless charm ideal for such a breezy adventure – whilst Michael Douglas brings gravitas to mentor Hank Pym. Coming so soon after Terminator: Genisys gave us a decent-looking youthful Arnie, the digitally de-aged Douglas in the opening scene here is scarily good too, with the CGI staying at a top level throughout. Devoid of an interesting villain and largely lacking in thrills, this is somewhat of a missed opportunity in the Marvel universe. Yet with a strong protagonist (who will be superb when thrown into the Avenger mix), a solid gag rate, and a light-hearted mood (resulting in a PG rating), it's an amusing film suitable for the whole family.