Unable to contact Tony Stark because of "the accords", Development of an Ant-Man film began as early as the late 1980s, when Ant-Man co-creator Stan Lee pitched the idea to New World Pictures, Marvel Comics' parent company at the time.
Cross is close to perfecting a shrinking suit of his own, the Yellowjacket, which horrifies Pym.
In the present day, Pym's estranged daughter, Hope van Dyne, and former protégé, Darren Cross, have forced him out of his company, Pym Technologies.
Cross perfects the Yellowjacket and hosts an unveiling ceremony at Pym Technologies' headquarters.
Lang, along with his crew and a swarm of flying ants, infiltrates the building during the event, sabotages the company's servers, and plants explosives.
Having been spying on Cross after discovering his intentions, van Dyne and Pym train Lang to fight and to control ants.