It's a rule of superhero movies that they must culminate in an overlong action sequence, with bodies and weapons crashing around everywhere. Now imagine if that sequence were the whole movie, but with unsuspenseful, drab-looking action. There you have Ant-Man and the Wasp: Quantumania, the latest and possibly lamest instalment in the usually reliable Marvel Cinematic Universe. The heart of Ant-Man (2015) and Ant-Man and the Wasp (2018) was Paul Rudd as everyman Scott Lang, who puts on his special suit and shrinks into the minuscule Ant-Man – or as I like to think of him, The Littlest Avenger. This third film throws all that away. The character is no more than a prop in a plot that sets up the next big Marvel villain, and does it without a jolt of energy.