I wanted to post this as a deal but as it hasn't been announced yet I didn't want to get any bad karma from people if the deal changes etc.
I was reading about the deals with Game (AAA+ game plus half the price MW2) and Gamestation (2AAA+ games Plus £5) and I decided to call Blockbuster to see what deals they are doing cause sometimes they do some good offers for new releases. Long story short, they said the were definitely price matching any local offers for all the big players but the interesting bit was that he told me that the staff have been alerted that they will probably be doing the AAA+ game plus £15 offer but there was no definitive list of games to trade but off the top of his head he said he remembered was Fifa 10, Uncharted 2, Halo OST, NFS Shift, PES2010 and Borderlands. He also pointed out that the list and offer is subject to change!
Ideally I'd like the credit for revealing this deal if it becomes true but I don't get much love on this website! lol! Hope it helps!