Three more characters were announced as coming to Supergirl today at the Television Critics Association Press Tour.
Executive Producer Andrew Kreisberg mentioned that early plans include Red Tornado, the Kryptonian Non, and General Sam Lane, father to Lucy Lane who is already showing up on the show as played by Jenna Dewan-Tatum.
Supergirl premieres October 26 on CBS. Stay tuned for more details from TCA as they become available!