On the off chance that somebody is feeling generous and already has Arkham City on their account, I'll be beating whatever the average is when I get paid on the 15th, but if I can go the route that doesn't get me Scribblenauts (since I really don't care about it), that'd be cool. Otherwise, like I said, I'll just beat the average on the 15th anyway and end up with a copy of Scribblenauts that I'll never play.
Edit: Scratch that. I just remembered that they pretty much always add more "beat-the-average" games, so I'll just beat the average on the 15th and call it good.