Who said the iPad Pro is going up in price? That's just conjecture.
This has become my mantra of late: If it doesn't have 5G and mini-LED, I'm not interested.
Why 5G? Just because.
Why mini-LED? Because while I think the LCD screens on the current iPad Pros are good, I still want something better. I don't like the grey blacks on those devices for video streaming consumption. Mini-LED may not fix this, but hopefully they can make it better than it is now. Otherwise I'd rather just save my money and stick with my already good screen on my 2017 iPad Pro 10.5". I have perfect blacks on my iPhone because it is OLED, but ironically, it's less critical for me on the iPhone since I don't watch a lot of streaming video on it aside from occasional short YouTube videos and video news reports. The grey blacks on the iPad Pros just bug me.
As for the CPU, since I already have a functional iPad Pro, I may as well wait 5 months, instead of buying a 2 year old SoC at full price in 2020. Hell, I may even wait until summer, to take advantage of the back-to-school sale to get me some discounted AirPods with ambient noise reduction.
In that context, the 2020 model would have to be discounted by something like 40% before I'd even consider it. Right now the 11" cellular model is CAD$1249. Thus, I wouldn't consider buying it unless it was $749 or so. The iPad Air doesn't interest me, since reports are its blacks are even worse than the iPad Pros, and plus it still has Touch ID and no Face ID. I like Touch ID on phones, but I don't like it on iPads. Face ID is where it's at on iPads IMO.