Digitalrev already lists the E-M1II on preorder :)
Digitalrev seems to cannot wait to see the new E-M1II camera and is already accpeting preorders on their site (Click here). And this is not the only “ghost” preorder from Olympus. Also the yet non announced 30mm f/3.5 MFT macro lens recently appeared on sites like Macconnection, Neobits, Amazon.cn, Unitedoffice.
Olympus had(?) the plan to announce the new E-M1II at Photokina. But I heard shipment will be delayed by many months. This means I am no more sure if the announcement will really take place anyway at Photokina or if Olympus will decide to wait a couple of months.