The roster for Injustice: Gods Among Us just keeps getting bigger. Now, Warner Bros. has unveiled Sinestro and Hawkgirl as playable characters in NetherRealm Studios' upcoming beat 'em up next month.

Warner Bros. has been doing a weekly series of Battle Arenas for the game, and this week's battle involved Sinestro, leader of the Yellow Lanterns, facing off against Superman, and the Green Arrow taking on Hawkgirl. There is no hint, however, of a reason yet as to why or how these two became enmeshed in the game's story line.

The game is coming to PlayStation 3, Xbox 360, and Wii U on April 16.