Set photos hint that Mongul's daughter likely appearing in the movie.

An unidentified actress was dressed like her costume in the comics. That'd be awesome if the DCEU introduced Mongul.

TEXT:

Mongal herself is a huge surprise, but it looks like it could portend the debut of her powerful father in the series. And while Gunn has not revealed any new details about the inner workings of his movie, Kevin Smith teased that the villain in The Suicide Squad will be a huge surprise for longtime DC Comics fans.

"Does anybody know who the villain is for [The Suicide Squad]?" Smith said on his Fatman Beyond podcast. "Alright, I do, and I just can't say it then. Because I thought everybody knew and I was about to say... I might have heard that privately... I'm not gonna spill it, but if it is what I heard, it is f—king phenomenal. And boy is it in the right hands with James Gunn."

https://comicbook.com/dc/2019/10/12/suicide-squad-2-first-look-mongal-mongul-james-gunn/