We reported on this in another post, but the rumors continue to swirl and so we thought it deserved its own post. We are now hearing from multiple sources that HBO plans to order both seasons three and four and film them back-to-back (à la Lord of the Rings). It has already been confirmed that A Storm of Swords would be covered in more than one season. From what we have heard, much of the film crew in Northern Ireland has been told of this plan and has been advised to expect nine months of filming next year.
Winter Is Coming: I have no doubt that this is an option that HBO is exploring, perhaps even leaning towards, but I don’t think it is a done deal just yet. HBO likely won’t announce anything official until season two begins, so they could change their minds before then.
It does make sense though, to do it this way, as they’ve already said they will be splitting book three into multiple seasons. This way they get the whole of the book filmed in one go, saving on production costs and keeping the kids from aging in between seasons.