What are the chances of walmart having mw2 at midnight?

i plan on heading over to walmart at midnight to pick up a copy at midnight. do you think there will be any left or will they sell out(because of all the people in line)..walmart is open 24/7 and i asked yesterday if they were accepting preorders and they said no but theyll be releasing it at 12:01 midnight.. so do you think there will be enough in stock for me to just go and pick it up without standing in line, or should i stand in line...please answer fast..im getting it for 360 by the way if it makes a difference