There's a guy (I think he's a guy, I don't know for sure) on X (aka Twitter) who's basically a professional leaker.
MajinBu, this is the dude's name, has just leaked what the next iPhone will look like, and it's interesting.
He generally gets it right, so these renders are likely very close to the real thing.
The new iPhone 17 Pro should get a new camera bump that covers a significant chunk of the phone.
You still get a three-camera setup, but some components were moved slightly to the right.
Also, and this is interesting, there are apparently going to be three new colours: orange, white and blue, and two familiar ones, gray and black.

As for iPhone 17, it'll look almost exactly like iPhone 16 and it'll be available in black and white, like iPhone 16, and also in green, steel gray, purple, light blue.

Then there's iPhone 17 Air, the long-awaited, ultra-thin, 'the thinnest iPhone yet'.
Like iPhone 17 Pro, the camera bump will extend across the whole frame, but it'll be a bit slimmer, and there's only going to be a single camera. In terms of colourways, it should be available in Black, White, Light Gold e Light Blue.

My prediction? People will still mostly go for the Pro version, but most will still stick to conservative colours. I don't think the Orange one will do as well as people think.
It's like buying a car, the red one intrigues you, but you'll still end up buying making the sensitive choice and go for gray, white or black.
I also think sales of the Air version will largely depend on how good it is.
It might do well at first, because it'll feel new and fresh, but then word will get around and it's either good (like AirPods Max, iPhone Pro, etc) or a bit 'meh' (Vision Pro, iPhone 16e), and sale can slow down quite quickly (apologies for the pun) at that point.