6) Legion Of Superheroes
In season one episode “Solitude,” Kara visits – you’ve guessed it – her cousin’s Fortress of Solitude. If you’ve got good eyes, you might notice one of the flight rings of the Legion of Superheroes on display. Hopefully, this is a tease for the team’s eventual introduction.
The Legion of Superheroes is a superpowered group from the 31st century – featuring the likes of Chameleon Boy, Saturn Girl and Lightning Lad – who travel back in time to the present. Usually they ally themselves with a young Superman, but Supergirl could easily fill this role if they appeared in her series.
The Legion is one of those comic properties that is not about to get a big screen outing anytime soon, so it would be great to see them in live-action in some form. Plus, the lighter tone they are known for means they’d be well-suited to Supergirl.