Supergirl kicked off Season 2 by bringing in one of the biggest superheroes off all time: Clark Kent, a.k.a. Superman. He dropped by National City in the Season 2 premiere to visit his cousin and lend a hand when Metallo and his kryptonite heart began making a mess of things for Kara. Superman took his leave of National City in Episode 2 of Season 2, and there was no saying if and when he'd be back. Now, we finally have an answer: Superman is coming back to Supergirl, and it's sooner than we might have thought.
Superman will return to Supergirl once more in the Season 2 finale, and it won't be another instance of a baby Superman or hallucination Superman or blurred-out Superman; E! News reports that Tyler Hoechlin will be back to bring the Man of Steel to life on the small screen. No details have yet been released about why Superman will drop by National City again, but Kara is currently facing enough threats that it's not hard to believe that she'd welcome a helping hand in the season finale.
For one thing, Kara is going to have to deal with the Daxamites now that Mon-El has made his choice to stick with her and the D.E.O. rather than return to his hedonistic life on Daxam. Given that Queen Rhea went so far as to murder her husband because he got in the way of her efforts to retrieve their son, I'd say that she still has some dastardly deeds up her sleeve for Team Supergirl to deal with in Season 2.
For another thing, Lillian Luthor and Cadmus are still out there to cause trouble. Supergirl has already revealed that Lex Luthor - who made his debut via flashback earlier in Season 2 - created caches of weapons designed to combat Superman prior to being captured and imprisoned; if somebody starts raiding these caches either to attack Superman or Supergirl, we can bet that two Kryptonians will be better than one in fighting back.
Of course, there's always the chance that Clark just wants to drop by and see his cousin Kara. Who knows? Maybe he'll simply be chasing a story for The Daily Planet all the way to National City. He could simply be in town whenever all the season finale action starts to go down. My money is on something more sinister bringing him to town, but Supergirl could go a softer route.
I'll admit that I was originally pretty skeptical about Supergirl bringing Superman into the fold. After all, Superman is arguably the best-known superhero in the history of the genre, and he could easily overshadow the Girl of Steel in her own series. It could have been like Batman showing up in a show about Robin: nobody is going to care about the lesser-known character if one of the biggest names in the biz shows up. (Not that I'm opposed to a Bat-presence on Supergirl.) I was pleasantly surprised when Tyler Hoechlin fit right into the Supergirl ensemble, and I'm definitely psyched to see how he'll lend a helping hand in the Season 2 finale.