10 DC Comics Heroes Who Still Need To Appear In The Arrowverse
4. Legion Of Superheroes
Which Show? Supergirl
Sticking with Supergirl for the moment, we'd also love to see the Legion of Super-Heroes appear on the show. This shouldn't be too difficult to do, considering they have been confirmed to exist on Kara's Earth-38 already. Just check out Superman's honorary Legion Flight Ring that's frequently glimpsed in the Fortress of Solitude.
A team of time-travelling heroes from the future, led by Cosmic Boy, Saturn Girl and Lightning Lad, the Legion are heavily tied into the Superman mythos, which has been brilliantly mined on the show so far. The clincher, though, is that Kara has also served on the team in the comics.
Thankfully, this one could actually happen. Mon-El's trip through a wormhole in the season two finale suggested he might end up in the future and join up with the Legion (as per the comics). Alternatively, a snap from filming has got fans theorising that the Legion could appear in the annual Arrowverse crossover. Let's hope so, as their inclusion would make a lot of old-school DC fans very happy.