OK, I can't decide

I know they're totally different games but I can only afford 1 right now.  Banjo Nuts and Bolts, MK vs DC or COD World at War???Again, I know they're all totally different. But which one would you pick if you could only get one? OK, I can't decide
u played cod4 so waw will probably dissapoint. i prefer cod4 by a mile. MK is surpriseingly good,with smooth live and gameplay. banjo is a good rental, so get MK vs DC.OK, I can't decide
I would play all 3 of them, but buy CoD and rent the other two
I would probably get COD since I hear it has a good multiplayer.
I'd stay with COD4 since you have it and go for Banjo since it is 39.99 then rent MK.