Dent was previously played onscreen by Billy Dee Williams in Tim Burton’s Batman films, Tommy Lee Jones in Batman Forever, and Aaron Eckhart in The Dark Knight.
If he is indeed playing a district attorney, Sarsgaard’s character would be one familiar to comic book fans: Harvey Dent, the DA who becomes the villain Two-Face.”
And Sarsgaard himself previously appeared in the DC Comics film Green Lantern, where he played Hector Hammond, the GL baddie with a big giant head.
According to The Hollywood Reporter, “sources speculate he could be playing a corrupt cop or a district attorney.