My assumption would be that the 11 inch air stays at $599 where it’s at now, the 12.9 starts at $799, and the new pros start at $999 and $1199 respectively.
I don’t believe that the entry-level 11 inch iPad Pro is going to go from $799- to $1600 with one update, but I could see it going up by 200.
Apple pricing rumors always seem to shoot way higher than the prices end up actually being, except for the Vision Pro oddly.
The base pro iPhone has been supposed to go way past $999 over the past six years, and that just has not happened no matter how much the rumors have insisted it would.