Like they did with the iMac Pro and HomePod speaker? Why do people even expect iPhones at this event when it's actually a software event. There's always a reason to complain huh.
Cook said it at the 2014 Keynote, near the end of the iPhone 6 portion. He said "One more thing..." (complete with the slide) and introduced the Watch.They stopped saying that phrase when Jobs passed away. I could be wrong, but Cook has never said that exact phrase...always something close or just nothing at all.
Apple has literally never done this with the iPhone, save for the announcement of the original. Why would you expect that to change now? They pre-announce products sometimes. This is especially true for Pro users, who drop many thousands of dollars per machine and will often upgrade a whole studio at a time. Those are low-volume machines. With the "hints", it wasn't a hint, they called in a select group from the media and, paraphrasing the entire conversation: "We're going to be making a modular Mac Pro next year because we messed up with the design of the original and waited too long to change course but still want our pro users to know that we're committed to upgrading their hardware." They haven't messed up with the iPhone or anything, so there's no reason to expect it. They pre-announce more Pro products because they're not mass-market and therefore Apple isn't really hurt in the short-term by people waiting for the new device.
Cook has said it to introduce the Apple Watch at the 2014 iPhone event, and at WWDC 2015 to introduce Apple Music.They stopped saying that phrase when Jobs passed away. I could be wrong, but Cook has never said that exact phrase...always something close or just nothing at all.