Because you demanded it: Tim Robbins is now in Green Lantern. The Heat Vision blog has revealed the outspoken liberal actor will play "Senator Hammond, the disapproving father of the movie's villain, Dr. Hector Hammond (Peter Sarsgaard), who becomes infused with psychic powers." Robbins fan can look for his name in both the opening and closing credits, and should expect to see him shake his head solemnly and deliver some scripted dialogue between the two.
The article also notes that Robbins has previously been seen in a comic book film, appearing in 1986's adaptation of Marvel's Howard the Duck. That early role really has no relevance to Green Lantern, but let's take a minute to remember how Tim Robbins was in Howard the Duck.