Are you talking about the Injustice 2 cinematic? Because if that's the case then "The Laughing man" has put some info on the game:
The guys behind the Mortal Kombat games and the first Injustice game.
You confuse the people working on the game and the people working on the cinematic. More often than not game related cinematics are not handled inhouse.
But yeah it's a perfect example of why I wish that these were properly credited since people just straighup jump to wrong conclusions.
As for why I believe the cinematics are done by Blur studio(again they aren't a game studio but a visual effects studio that do work on games, movies, other products) is that they've done the previous Injustice game. Other things in games of the top of my head are the Star Wars MMO Old Republic cinematic, I think 2 of the arkham games, Dishonored 2 and tons more.
But I think it's easier just to visit their site. http://www.blur.com/work/
Admittedly most probably won't care nevertheless proper credit feels important to me.
EDIT: Oh missed Laughing Man so yeah just echoing what he said.