Apple introduced the iPhone 6 and 6 Plus on September 9, 2014, and rumors have started circulating online saying that the company could and may reveal their successors the same date this year. The timing would align with Apple's strategies from previous years -- including the iPhone 6 last year, which also was announced on that day.

Apple may also use the event to talk up its newest iPads and its Apple TV revamp. That would mark a break from Apple's traditional strategy of holding separate events for its smartphones and tablets. Typically, the iPhone is announced in September and is followed by the iPad in October.

This year's iPhone launch is the "S" cycle, which means the devices likely won't feature new hardware designs but instead could include other tweaks, like how Siri, Apple's voice assistant. The company is expected to add its ForceTouch technology to the new devices, which would let users press the screen like a button to deliver a different command than simply touching the screen. Apple hasn't confirmed this, but analysts that monitor the company's supply chain regularly have all said they?ve seen evidence that Force Touch is coming to the iPhone. Force Touch is a new feature Apple has added to some of its most recent products, such as the Apple Watch, new MacBook, and new MacBook Pro models.

Other tweaks could include a faster processor and a new camera.

Apple also is expected to reveal a new Apple TV box that it potentially will launch alongside an Internet-delivered television service.