NetherRealm's Injustice 2 has a deep bench of DC comic characters to choose from, and will be expanding its roster, in a sense, with alternate skins.
The Injustice 2 pre-order site (via IGN) reveals three alternate characters. Power Girl will substitute for Supergirl, while Reverse-Flash and John Stewart's Green Lantern will swap out for Flash and Hal Jordan's Green Lantern, respectively. Power Girl comes in the Digital Deluxe edition for $79.99, while all three come in the Ultimate Edition for $99.99. They also come with sets of three and nine so-far unannounced DLC characters and some hero shaders.
Just yesterday, NetherRealm dropped a new story trailer for the superhero sequel, introducing Brainiac as a big-bad pulling the strings and forcing heroes to reshufle their alliances.