Here's my theory: The US knows Saddams' WMDs went to Syria, and the US is putting pressure on Assad Jr., the same way the US and Britain pressured Quaddafi. I would not be surprised to see an announcement (the last weekend of October, if we're lucky) from Little Assad admitting that Syria received Saddam's WMDs before and during the Iraq war, and "in the interest of regional peace" is turning them over to the US or some international entity like the UN.
I had the same thoughts/hopes. If only it becomes so.