The first season of Supergirl used Superman almost like a tongue-in-cheek imaginary figure that carried enormous weight. Often spoken of but never seen, the superhero had a shadow that loomed large over National City. Now that the series has finally brought him into the light, there's going to be an adjustment period for the established characters on the series.
Relationship dynamics have been a big part of Supergirl so far, and just about everyone's connection was tested. Alex and Kara were the cornerstone of the show, with their sisterly love overcoming Astra's death, Alex being brainwashed, Kara being trapped by Black Mercy, and Alex saving Kara's life after she saved the world. They have been through the ringer and have always come out strong on the other side, but that doesn't mean it ever gets any easier.
As the show navigates the thread of chosen family vs. blood relations, J'onn J'onzz will find also himself drawn back to his roots with the arrival of Ms. Martian to Supergirl. That theme will continue as the second season kicks off because Clark's physical presence is sure to interfere with Kara and Alex. In speaking to EW, co-creator and executive producer Andrew Kreisberg dishes on the rift that the larger-than-life Superman brings with him to the Danvers family:
“Alex has been everything to Kara; she’s her family. Alex has a little bit of a chip on her shoulder about Clark. She loves him and he’s family, but he left Kara on their doorstep. Kara is so excited to see Clark and so excited to be with him, it’s almost a little bit like Alex feels taken for granted, because she’s the family member who’s put in the time. It sets up an interesting conflict between her and Kara in the first couple of episodes.”
Alex's feelings could certainly be justified, especially if she sees Clark as a distraction for Kara and what she's trying to achieve. Regardless of what obstacles Kara and Alex ran into throughout the first season, Kara has always made it abundantly clear that the two of them are inseparable. Let's just hope the conflict between Kara and Clark reads more like protective sibling and less like jealous 3rd wheel.
In comments made earlier this month, Kreisberg also mentioned partnership was a big focus for Kara and Clark's relationship. So far, Tyler Hoechlin's Superman is only slated to appear in the first two episodes of the second season, but depending on fan reception, he could return later (if the story permits).
But if family drama can't be worked out in a civil manner, perhaps we'll see a version of superhuman fight club with Roulette's confirmation as a villain for season 2.
The Flash season 3 will premiere Tuesday October 4 at 8pm on The CW, Arrow season 5 will premiere in the same timeslot on Wednesday October 5, Supergirl season 2 on Monday October 10, and Legends of Tomorrow season 2 on Thursday October 13.