“Imagine a soldier the size of an insect — the ultimate secret weapon,” says an eerie voice to open the new Ant-Man trailer. It’s an unlikely tag-line for a superhero movie, but Marvel’s latest project – starring funny-man Paul Rudd as the titular shrunken crime-fighter – appears to have a sense of humor about itself. Rudd plays Scott Lang, a small-time thief recruited by Dr. Henry Pym played by Michael Douglas to don the shrinking suit that gives him superhuman strength.