Source from Dfw airport hinted to me by 2013 BA and Emirates would be flying to DFW. At first I said you must be talking about Etihad, because Emirates has x2 daily IAH and there would be no need to come here. Well, according to the source Emirates is limited with A380 capable airports and DFW holds a large Asian population giving the demand they feel can work.
In regards to BA, I checked their A380 delivery time and 2013 is the start date. so this could have some truth to the situation.
Just my two cents,