If that money is true, it would about do what is needed. 350 mill for Racers or an equivalent attraction, 100 mill for the Monsters Coaster, 50 mill for a flat ride package, 50 mill for restaurants, 75-100 for a replacement for AIE/Sounds Dangerous building, and the rest goes to theming/ride upgrades.
With the 250 mill, it goes to EPCOT. 100 to completely redo the Imagination Pavilion, 25 to redo Universe of Energy, 25 for aesthetic help, and 100 for something big in WS.