Wow, you seem sure of yourself! Yes they will. Here are a few reasons why you're wrong.
1. It's still too early to speculate. Mass production hasn't started yet.
2. Do you remember any leaks on the Mini 3? Didn't think so.
3. They aren't going to leave their most popular iPad line with last years specs and let iPhone users have better stuff.
need to revive the iPad sales. I just said that the Air is their most popular line, and probably still will be when the Pro comes out.
5. There's probably 'no leaks' because there's nothing interesting to show. It will probably still have the same design, and I don't remember ever seeing leaked footage of a device that looks just like the previous generation.
There are more reasons, I just can't think of any. Just mark my words. An Air 3 will come.