The veteran actor has signed up for “The Judge.” Downey Jr. has long been attached to the project, and last spring the “Wedding Crashers” and “Fred Claus” director David Dobkin came on board as well. And now with Iron Man free from his Marvel duties for the moment, this one is taking firmer shape. The dramedy centers on a big-time lawyer (RDJ) who returns home after his mother dies, only to learn that his father — who happens to be the judge (Duvall) — is a suspect. Working to get to the bottom of the case gives him the opportunity to reconnect with his family. “The King’s Speech” writer David Seidler and Nick Schenk both tackled drafts with Bill Dubuque (who made the 2011 Black List last year with “The Account“) writing the most recent screenplay.