Who he is: Yellowjacket, a.k.a. Darren Cross
His power: The Yellowjacket suit is a weaponized version of the Ant-Man technology, meaning in addition to shrinking abilities that maintain its proportionate size and strength, Cross can also fly and release energy blasts from two “stingers” in the back of the suit.
His story: Darren Cross, who only appears in the film Ant-Man, was a brilliant scientist out of MIT at age 20 when he was recruited by Hank Pym to work at Pym Technologies. However, Cross eventually forced Pym out and took over, renaming it Cross Technologies and developing weapons-grade tech. Cross was obsessed with Pym’s Ant-Man technology and eventually figured out how to use it, developing the Yellowjacket. Unfortunately, Cross learned of the plan Pym hatched to steal the Yellowjacket suit, and instead captured Scott Lang during the attempted project. But charges placed in Cross Technologies detonated, destroying the building—and with it, Cross’ deal to sell the tech to Hydra. Furious, he donned the suit and fought Lang, but was killed when Lang damaged the Yellowjacket’s internal mainframe, shrinking it and crushing Cross.
Played by: Corey Stoll
Currently, Yellowjacket is: Crushed like a gnat. R.I.P., Darren Cross.
Where will we see him next? We won’t, save for any potential flashbacks.