Superman and Supergirl will take on General Zod in the season finale!

General Zod is coming to Supergirl! Mark Gibbon has been cast as one of the most iconic Superman villains of them all. While I've confirmed Mr. Gibbon's casting with Warner Bros., they weren't able to offer any additional details at this time.
However, there are only a few episodes of Supergirl left this year, and production is about to begin on the season finale, which means that's likely where we're going to meet the DC TV version of General Zod. That season finale also features Superman. It will be interesting to see whether this is the TV Man of Steel's first encounter with General Zod or if the two have a history together.
What's interesting is that this isn't Mark Gibbon's first time interacting with the Superman mythos. Gibbon played one of the oil workers rescued by a pre-Superman Clark Kent in Man of Steel, and he appeared in several small roles on Smallville.
The commander of Krypton's military has long held a grudge against the House of El, since Superman's father (and Kara's uncle) banished him and his cronies to the Phantom Zone. Hopefully this means he's bringing some of his Phantom Zone buddies along for the ride, too. Considering how well Supergirl handles the broader Superman mythology, I'm really looking forward to seeing how they play one of the biggest rivalries in Kryptonian history on the small screen.
General Dru-Zod has been around since 1961, first appearing in Adventure Comics #283, where he was created by Robert Bernstein and George Papp. Zod has famously been brought to life on the big screen by Terrence Stamp (in 1980's Superman II) and Michael Shannon (in 2013's Man of Steel) and the small screen by Callum Blue on Smallville. Recent comic book interpretations of Zod have hewn a little closer to the movie versions, so there's a lot of room for Supergirl to get creative with the character.
Bleeding Cool were the first to report the General Zod news.