Liotta will play Dr. Doom, says Moviehole, who apparently got the news from AICN. ?Moviehole is reporting that the casting choice is set, but it has not been definitively confirmed.

Dr. Doom is the green caped, metal bodied nightmare with a stony, emotionless face and big muscles.  Doom has evil plans that must be foiled, thus giving the Fantastic Four a reason to exist and a way to be fantastic on a daily basis.

The role of Dr. Doom has been linked to other actors, including Tim Robbins ("Huduscker Proxy," "Human Nature"), who has a baby face and only medium-size muscles.

More news when it happens.