Fan Casting Gargantua in Edgar Wright's Astonishing Ant-Man

Edward Cobert graduated from Cornell University with a Master's degree in biochemistry. Employed by Dynatechnics' Pittsburgh branch, he worked on an FBI-SHIELD project dealing with producing a new super-soldier. When the project was shut down prior to human testing, Cobert decided to illegally test the procedure on himself. Over the next month, his body mutated, growing in height and muscle mass. After the first week, he was unable to hide the changes; after the second week, his intelligence had dropped considerably, a side effect he hadn't considered. Dynatechnics kept him hired, officially, but moved him from researcher to test subject, keeping him sedated and secured as other scientists studied his notes and worked to reverse the process. But even they couldn't contain him for long, as the cost of maintaining the sedatives necessary to keep him docile took their toll financially on the company. Cobert, now referred to as Leviathan by Dynatchnics, broke free of his restraints and went on a rampage throughout Pittsburgh. This led to a battle inside Three Rivers Stadium between Leviathan and the (since retired) adventurer Avril Aero, who had been in Pittsburgh pursuing another case. Following the fight, Leviathan was arrested by SHIELD and moved to a secure secret location, as the Vault did not have space for him. A decade later, Cobert was released into the custody of a man claiming to be a relative of his. This man was later revealed to be the Mad Thinker, who used Cobert – who the Thinker rebranded as Gargantua – as a diversion to infiltrate the Chicago Dynatechnics offices). This put Gargantua into conflict with Giant-Man, while Ant-Man and Wasp foiled the Thinker's schemes. Gargantua was again arrested, though the Thinker escaped.