No further details seem to be available at this point, but surely Supergirl wouldn’t name an episode after Superman without actually bringing in Superman, right?
The third episode of Season 4 will be titled “Man of Steel,” according to SpoilerTV.
I’m guessing the super-cousins will have plenty to talk about whenever he shows up next.
He’s probably due for a chat with his cousin after her latest villain came so close to terraforming Earth that he had to go save Madagascar.