The Man of Steel is coming to National City. Superman will appear on the first two episodes of Supergirl season 2, flying to television just as Supergirl flies to its new home on The CW. The character has not yet been cast, but his appearance was revealed via a press release, perhaps because casting announcements have just been sent out. "We are currently in the casting process for this role," Warner Bros. TV announced, implying that we won't see big-screen Superman Henry Cavill crossing over to the land of television, in keeping with the previous separation of DC's TV and Movies.
"Greg, Ali and I are beyond thrilled to welcome Clark Kent and his slightly-more-famous alter ego to the world of Supergirl. Superman will be appearing in the first two episodes of the new season and we cannot wait to see who next dons the red cape!" said executive producer Andrew Kreisberg.
The character of Superman has already appeared on Supergirl, just only as a purely CGI character, and always with his face obscured. Clark Kent gave Kara some encouragement via instant message throughout the first season of the show, which aired on CBS, as well. Previously, it was speculated that he wouldn't fully appear on the series, as it seemed most characters appearing on the big screen in feature films were being held off from the small screen - characters like Amanda Waller and Deadshot (and the whole concept of the Suicide Squad), for example, were killed off on Arrow as the Suicide Squad film approached.
Kreisberg previously told Comicbook.com last November that they hadn't "been jonesing to have Superman on [the show]." He explained that it was a purely creative decision, though, by those running the show (Kreisberg, along with fellow EPs Greg Berlanti and Ali Adler), and that there wasn't "anything [they've] asked for that was not given to [them]."
The EP also said in that previous interview that "if you're going to cast Superman, you've got cast Superman right!" That seems to click with the idea of announcing the character's appearance while the casting process is ongoing.
"For us, Superman is more of an idea than it is a personification of the character, so we're more than happy to have him backlit," Kreisberg said of his season one appearances. "We're perfectly happy to have him swoop in, save Kara in Episode Three, because the real heart of the story is that she then kicks Reactron's butt. She's the one that takes him down, and that's what much more important for us.
"So it's not like we've been asking for more Superman or can we do it like this or can we have him in this. For us, we're perfectly happy with the amount of Superman that we've had because it's the exact amount that we've asked for."
Now, they've asked for him.
Superman comes to Supergirl as the show joins the DCTV line-up on The CW. Starting this fall, The CW will have a DC Comics-based superhero TV show Monday-Thursday nights at 8pm. The network has also already announced a four-way crossover between the series, though they've given no details on how exactly that will happen. Currently, Supergirl exists on an alternate Earth from the other three shows, Arrow, The Flash, and Time-Traveling epic Legends of Tomorrow, though thanks to the antics of the last two, it is easy to see how they could either travel to that world or merge it into their own sometime this season.
Supergirl currently employs two former members of the House of El, as Helen Slater, who played Supergirl in the 80s film and Dean Cain, who was Superman on Lois and Clark in the 90s, appear as Kara's adoptive parents. Some fans have petitioned to have Smallville's Tom Welling, who played a young Clark Kent on that series for ten years, to return as Superman on Supergirl, though those petitions haven't typically flown very far.