Movies.ie published a news item about the “The Trial of the Chicago 7” movie. They mention that Steven Spielberg is no longer attached to the project and that Peter Greengrass is rumored to replace him.
Colin Hanks is rumored to play a part in this film, too.
Variety article mentions Spielberg’s “Chicago 7?, March 6, 2008
Spielberg probably dropped the “Chicago 7? project, March 1, 2008