Ask yourself what you want your players to be like. Do you want us blundering around in the dark, trying to find the enemy hiding in the corner? Do you want us to have a vague, oracle-type prophecy ("When the chariot of the Orient is ascendant, the Chosen shall stand before the breaking land and decide the fate of Olympus") and nothing more? Do you want us to know the primary enemy on a first-name basis, or think we do? Do you want it to be like a battle with no fog of war, where we know all the problems and just have to find a way to solve them?