One of the most fun topics I think you could have, and it would likely generate good liquidity. I'd recommend multiple markets for each movie that opens in wide release each weekend (e.g., American Sniper to gross $75 million or more opening weekend, $80 million or more opening weekend, etc.). Thanks for your consideration! 

At this time PredictIt is legally limited to questions about politics and certain economic indicators.

I think this would be a great market and would love to participate in one if it gets set up.  How do we get it started?

Here here!!