From WENN.com

The Iron Man actor will star in upcoming movie The Judge, about a lawyer who returns to his hometown for his mother's funeral to discover his father, who suffers from Alzheimer's disease, is suspected of her murder.

According to The Hollywood Reporter, producer Downey, Jr. is hoping to convince Nicholson to play the role of his onscreen dad and has handed the script to The Shining legend, who has only starred in six movies over the last decade.