I'm still trying to wrap my head around what could happen once it hits the futures market.

My biggest question is. Does a future on a commodity really do anything to the price or is it just insurance encase your main position (long or short) doesn't play out.

Can a future really predict the price of that commodity? Like people buy a short future against corn encase there is major floods that destroy corn crops. But the future itself doesn't cause it to rain or not rain.