Brink Vs Mortal Kombat 9?

I know this 2 games r totally unrelated.But i've to go to another city to purchase games since i live in a town.So please Help me as early as possible giving u'r suggestions to buy which game.I am visiting that city this weekend.Should i buy MK9 or should i wait for brink.I can't buy both cos i am buying LA Noire & InFamous 2 for sure.Please Help!!!