Injustice 2 is on a warpath to justify that $100 buy in for all the DLC characters this game is gonna come with. A couple days ago it was announced that Cyborg will be joining the fray, and it looks like we can expect a new character reveal March 2nd.
As for who the character could be, there are still a few original roster characters who have not been locked down yet such as Shazam and Black Adam. I would imagine whoever is being revealed would have to be a villain as those reveals have been much slower than heroes, but who knows? We will all know for sure when the hero is revealed this Thursday!