Well, it looks like the Man Of Steel will appear to help out his cousin after all ! In a new Canadian promo for next week's episode of Supergirl, you can clearly see Superman swoop in and save Supergirl from Reactron. Whether or not we will see his face or how big a part he will play in the episode is currently unclear. We also have no idea who will be playing him, if he does play a larger role in the episode.
Superman has previously made a quick cameo in the pilot for the show, and Clark Kent (along with Lois Lane) was mentioned in the show's 2nd episode. However, with the infamous DC embargo on Batman and Superman that has haunted The Flash and Arrow for so long, it is unlikely that we will see much of the Man Of Steel in Supergirl.
"Fight or Flight" - Supergirl's powers are tested when Reactron, one of Superman's formidable enemies, arrives in National City and targets the young hero. Also, Cat plans to run an exposé on Supergirl, on SUPERGIRL, Monday, Nov. 9 (8:00-9:00 PM, ET/PT) on the CBS Television Network. Peter Facinelli guest stars as tech entrepreneur Maxwell Lord.