I'm trading my Xbox 360 games for Mortal Kombat in Gamestop...?

I heard that Gamestop(Which is EB games, since I'm in Canada) has an trade-in offer for Mortal Kombat. I'm going to bring my Batman: Arkham Asylum, UFC Undisputed 2010, and Forza Motorsport 3 tomorrow. Do you think it's enough for me to get Mortal Kombat for free?