While speaking about his forthcoming Battleship movie, Berg told members of the press that the Hancock update will eventually happen, but he probably won't be available to shoot it until after 2010.
The Friday Night Lights creator has a busy schedule ahead of him with work on Battleship and drama Lone Survivor.
Scheduling conflicts with various people involved in the proposed sequel, including Will Smith, also need to be worked out, he said.
"There are so many cooks in that particular kitchen that are so busy and Will's kind of taken time off to be with his kids and his kids are now making all kinds of films and there are so many people involved in that from Will to his partner James Lassiter to Akiva [Goldsmith] to Michael Man and myself," Berg stated.
He added: "To get us all in the same room where we can talk and then agree on anything? You'll never meet a group of people who will have a harder time agreeing on anything. It's like the Israeli peace process times a thousand in how tough it is for us all. But I think it will happen, we just all have to get in the same room with some consistency."
In September, Berg confirmed that stars Smith and Charlize Theron will both return for Hancock 2.