edit: i was late, use this thread instead -> http://www.esreality.com/?a=post&id=2170125

Doom 4 "Indefinitely Postponed" Following RAGE’s Disappointing Launch @ kotaku.com
The apparent source says that Zenimax and Bethesda made the decision based on the "the issues and reviews" surrounding RAGE's launch, which in their eyes has demonstrated "a serious lack of confidence in the project management at id".

note that the news is unconfirmed so far