Apparently there's something they want to build at Fair Park besides the new arena. Probably something that voters wouldn't approve thru MAPS or Go-bonds. They want to have a huge nest egg to fund these particular projects in addition to maintaining some capital for operations . Notice that an emphasis has been put on parking inside the Core & Fair Park.

OKC voters are fed up with funding Fair Park through MAPS; this is one of the reasons why you didn't see the new State Fair Arena on the September 12 General Obligation Bonds initiative or on the MAPS III two year extension vote to fund safety (Police & Fire).