https://arstechnica.com/gadgets/2024/08/apples-next-iphone-announcement-will-happen-on-september-9/

Apple's next product announcement event is happening on September 9 at 1 pm ET, the company announced today. While most of Apple’s products are updated irregularly, Apple has reliably launched next-generation iPhones every September since the iPhone 5 was announced in 2012. This year, we expect new iPhone 16 and iPhone 16 Pro models.

The most reliable rumors about Apple's next-gen iPhones (gathered here by MacRumors for your convenience) point to mostly iterative improvements to the current versions: marginally larger screens for the Pro phones, an Action Button and a rearranged camera bump for the non-Pro phones, and improved processors for each. Notably, both phones should be compatible with the first wave of Apple Intelligence AI features; as of this writing, the iPhone 15 Pro is the only iPhone that will support Apple Intelligence when it launches.