The Supergirl TV Series has been deleted to selection. It was available for a short period of time (in 2015 during the airing first season on TV). Now you can only access to the original version (the one from the game). However, there is a bug on console where players can't scroll down to select Legend Character they want (to play with those bought or to complet feats). Of course, I'm concerned by this issue and me too I can't see the DCUO's Supergirl that I bought. It's freaking
If you bought her before you should have her. They only took the ability to purchase her anymore. But as Babu said, there is a scrolling bug with the new UI for Legends Character Select.
I've purchased her. Yes i bought her long ago. But she disappeared. Hopefully this bug gonna be fixed Soon™