Although it isn't known what role Burn Gorman will play, Diego Klattenhoff is playing a rookie cop who wants to make a difference in Gotham. While these deals haven't been made official, offers are out to both actors.
Diego Klattenhoff is also set to star in the Showtime series Homeland, which may lead to a scheduling issue. We also reported earlier today that Daniel Sunjata joined The Dark Knight Rises. At the time, it wasn't known what character Daniel Sunjata is playing, although new information indicates he will portray a special forces operative.