Some reports also say Apple will introduce other new products at the event, including a 13-inch MacBook Pro with "retina display" and an upgraded Mac Mini.

CNN: Apple schedules 'iPad Mini' event for October 23

While we might not see new iterations of the iPhone or an updated iPad mini with a Retina display, Cook might introduce the aforementioned Mac Pro as well as the long-rumored iRadio music subscription service.

FORBES: Apple Loop: Macs Made In Texas, iOS 7 Goes Black And White, Microsoft Mocks Siri

Less certain (but certainly believable) is an iMac refresh, which would again get served with a Retina display, and a fourth major Mac update is apt to see the practically forgotten Mac Pro or the Mac mini updated with bolstered internals.

ENGADGET: Apple reportedly readying numerous Retina display MacBooks and multiple accessories for WWDC