I'm going to spoiler this just in case but:
Word has it that chapter 1 of story mode takes place before the first game but then moves along past that games story.
Yeah this is confirmed by multiple sites that played the first chapter.
Chapter 1 is a flashback re-telling the part of the original Injustice comic where Batman and the Regime fight at Arkham Asylum, but stuff has been retconned. I won't say what exactly but yeah, Damian is Robin in this flashback and iirc we haven't seen story cutscenes without him in Arkham Asylum, so who knows how he's portrayed in the rest of the story.
Personally, I feel like they're doing an MKX Liu Kang/Kitana/Kung Lao thing with Robin where there default appearances are misleading in order to hide story elements.
Personally, I feel like they're doing an MKX Liu Kang/Kitana/Kung Lao thing with Robin where there default appearances are misleading in order to hide story elements.