Warning: SPOILERS for Injustice 2 and Injustice vs. Masters Of The Universe
The first issue of a new Injustice Vs. Masters of The Universe comic book mini-series has revealed that a Batman besides Bruce Wayne is now leading the Insurgency against Superman's Regime. Precisely who this new Batman is, however... remains to be seen.
Injustice Vs. Masters of The Universe is set after the events of the "Absolute Power" ending of the video game Injustice 2. This potential ending saw the tyrant Superman defeating Brainiac and absorbing his power, allowing him to retake control of the Earth of the Injustice reality. The closing movie saw Bruce Wayne enslaved by Superman's command of the Brainiac technology and the corrupted Superman offering Supergirl the choice to join him willingly or be assimilated into his army.
With the loss of their leader and now facing a Superman who now has access to some of the most advanced technology in the universe, The Insurgency are forced to look elsewhere for someone capable of fighting the monster that Superman has become. This leads them to the planet of Eternia - home of He-Man.
Yes, the magical barbarian hero is apparently as famous around the universe for his noble heart and colossal strength as Superman used to be,. He's approached by a group of Earth's heroes who ask for his help. Leading the way is a man dressed as Batman, who is later revealed to be someone besides Bruce Wayne, after it is confirmed that the original Batman is still under Superman's control.
The issue offers very few clues as to the identity of the new Batman. One hint comes when He-Man's companions, including the comical wizard Orko, offer to lend their aid to the battle to save Earth. Despite Teela's reservations, Batman says Orko can come along because "he makes me laugh." Later, Harley Quinn refers to the new Batman as "Baby Bats" and teasingly slaps his butt. This earns Quinn a stern rebuke and a warning that she should never touch him again.
The most likely guess is that the new Batman is Damian Wayne. While possessing a far greater tendency toward extreme violence than his father, Damien has been shown to have an appreciation for childish humor and indulging those few things that allow him to experience the normal childhood that was denied him. He's also been shown to have a strong dislike of Harley Quinn, who mockingly called him "Baby Bats" more than once. While Damien fought against The Insurgency in both Injustice games, his final fate in Injustice 2 was left undetermined, so it is not impossible that he switched sides after learning what Superman had done to his father. It's also worth noting that Cyborg - who was as loyal to the Regime as Damian was - is now part of The Insurgency in this comic.
Another possibility is that the new Batman is Jason Todd a.k.a. The Red Hood. One of the DLC characters in Injustice 2, Jason had already impersonated Batman once before in the reality of Injustice. Jason wore his mentor's costume and claimed to be the true Batman while serving as part of Ra's Al Ghul's team that fought against both Superman's Regime and Bruce Wayne's Insurgency in the Injustice 2 comic book series.
However, it seems unlikely that Todd would agree to work with the non-murderous Insurgency without a major change in attitude. Whoever the new Batman is, the mystery is sure to be solved in future issues of Injustice Vs. Masters Of The Universe.
Injustice Vs. Masters Of The Universe #1 is now available from DC Comics.