Stargirl's first Arrowverse crossover should be with 'Supergirl' and not 'The Flash', here's why
'Supergirl' was one of the first female-led superhero shows, leading the way for more superhero shows on television with female actors leading the way
With the announcement that 'Stargirl' would be returning for a second season and airing exclusively on The CW, a crossover with the Arrowverse seems inevitable. With 'Arrow' come to a conclusion during the 'Crisis on Infinite Earths,' 'The Flash' is now the flagship Arrowverse series, making it the frontrunner for a 'Stargirl' crossover, but if 'Stargirl' is going to be crossing over with the Arroverse heroes, the first show it should crossover with should absolutely be 'Supergirl.'
'Supergirl' itself was not a part of the Arroverse when Kara Zor-El (Melissa Benoist) first met with the Flash (Grant Gustin). A part of the CBS network, the Flash-Supergirl crossover generated a lot more buzz than early Flash-Arrow crossovers did; it was the first sign of just how big the Arrowverse could get to have a cross-company event. 'Supergirl' has since joined The CW post-Crisis and has become a literal part of the Arrowverse, as National City joins Central and Starling City over on Earth-Prime. The residents of 'Earth-Prime' are currently unaware that the rest of the Multiverse exists, but Stargirl's (Brec Bassinger) Blue Valley is only a quick jump away from Earth-Prime over on Earth-2.
While 'The Flash' contains more multiversal crossovers than any other show, it's 'Supergirl' that carries themes closest to the ones we've seen on 'Stargirl.' Both Stargirl and Supergirl are legacy heroes, filling the capes and costumes of their distant counterparts. Both of them are carving out a new name for themselves and leading a new generation of superheroes against the fight against injustice. Most importantly, both superheroes are meant to be bright, shining inspirations to young girls wanting to see themselves as superheroes.
'Supergirl' was one of the first female-led superhero shows, leading the way for more female-led superhero shows on television. With 'Batwoman,' the Sara Lance (Caity Lotz) led team on 'DC's Legends of Tomorrow,' a possible 'Green Arrow and the Canaries' spinoff and females getting equal billing on shows like 'Black Lightning' and 'Superman & Lois,' the future of the Arrowverse is decidedly female and 'Supergirl' helped spearhead all of that. 'Stargirl' is taking the legacy started by 'Supergirl' forward, and it's only fair that her entry into the Arrowverse start with the superhero who started it all.
'Stargirl' airs Mondays on DC Universe, and Tuesdays on The CW.