We are finally going to see Superman in season two of Supergirl.
Warner Bros. Television has officially announced that The Man of Steel will appear in the first two episodes of Supergirl's second season. So far we've only been given glimpses of Superman in the show, but now it's time for Superman to step out into the light.
"Greg [Berlanti], Ali [Adler] 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!" - Andrew Kreisberg
I have a theory, and my theory is unlikely to be true since WB is already on the hunt for a new Superman, but what if when Barry Allen traveled back in time to alter the future, he ended up bringing the worlds of Smallville and Supergirl together for a great Kryptonian crossover. Fans would love to see Tom Welling return as Superman and it would surely be a way for the CW to boost the ratings for the opening of Supergirl season two.