While it was previously announced the Walton Goggins would be appearing in Ant-Man and the Wasp, it was largely thought he’d play a character such as Crossfire or Taskmaster but at tonight’s panel, he was confirmed to be playing a character by the name of Sonny Burch.
Burch is a character deep in the Marvel mythos. In the comics, he’s the chairman of Cross Technologies — coincidentally the company we were introduced to in Ant-Man.
He has traditionally been a character rooted in Iron Man lore but now that Cross Technologies itself is based within the Ant-Man franchise, once could assume that Burch will want to get back at Lang and Co. for the destroying the company he so feverishly worked for.
Source: comicbook.com