The thing with JL is, there is already plenty assets available on the art side: most heroines (and at last for me conflict with day-versions of Heroines would add so much spice to having them in cell and in bordello) plus we had already visits from Batman and Nightwing. So if basic figurines for Superman, Flash and Green Lantern could be made. And Villains that we have are also underused. So for starter just make random encounter system using existing locations: Lex meets heroine or hero or few of them, they threaten him. Mercy finds them snooping around the tower. Harley does something crazy and lands in prison a now you have to get her out (using existing system). Maybe "greatest detective" starts suspecting this whole cosplay strip club and starts investigating, but Lex uses Lois to run story "Batman visits Bordello".
No need for fancy danger system that was just recently cut out to make things complicated to code, just some illusion of progressing story and threat. Maybe later in game need to develop some new technologies again to protect yourself, since there is not much to spend you money on. And sometime down the road one panel with some fight scene maybe could be made once in a while. But mostly keeping it low effort (art wise) to not divert attention from content that is most important.