The protégé who took over the company, and wanted the one thing his mentor had refused to give him.
Darren Cross was Hank Pym’s protégé, and Ant-Man is about what happens when the protégé works out what the mentor was hiding. In 2015 he tries to recreate the Pym particle formula, the thing that lets a person shrink, and to sell it at a black-market auction. Scott Lang, Pym and Pym’s daughter Hope van Dyne stop him, which stings twice over, because Hope was Cross’s own protégée and the person he had hoped would be more than that. Corey Stoll plays him.
He puts on the Yellowjacket suit for the final fight and loses it in the worst way available: shrunk unevenly to subatomic size and dropped into the Quantum Realm.
Minor spoiler
Quantumania finds him there, mutated and cybernetically rebuilt into a creature that is mostly head. The name is an acronym, Mechanized Organism Designed Only for Killing, and he works for Kang the Conqueror until he does not. Before the end he turns on Kang and makes his peace with Lang, Pym and Hope, and dies having done so.
Show detailsWhat is not counted
Wikipedia also lists him in WHIH Newsfront, a web series from 2015 to 2016 that is not a title in this catalogue, so it is not in his list.