Originally Posted by JB-the-Hunter
I could see Radioactive Man being in Ant-Man as a/the villain. Other than Ultron all of Ant-Man's villains are lame. Radioactive makes sense because he's a science based character, and biologically altered just like Pym.
I see Radioactive Man as being too strong for Ant-Man. It's also because of Thor that Chen Lu became Radioactive Man, and Thor was the first super hero he fought.
He first appeared in JIM#93: