90D or even 80D sensor
Dual Digic 8 processors
At least 10 fps
Tap and drag focus point adjustment available on the touch screen, but I would also like a joystick
Dual cards (SD only is fine)
RF mount, with the option to use EF and EF-S lenses with an adapter (the 17-55, 10-18 and the latest 18-135 are all decent)
LP-E6n battery, and a grip with full controls, dual batteries, and USB-C sequential charging
Video output that doesn't need excuses
Wouldn't mind if it had a flippy screen, but I wouldn't mind if it didn't
At least as tough and water resistant as the 7D MkII
Low-light capability that enables the EF 100-400 on a 1.4x converter (eq. 224-896mm) to work well with focus points across the whole area
If they only go with a single card, no joystick and a fixed screen the smaller sensor should partially offset the cost of the extra processor, so it could possibly come in at about the same price as the R. But give me controls more like the 5D and 7D series rather than the R stuff.
7D moves a lot of big whites. That is the primary reason why I have been shocked at how poorly the 7D fans have been treated.
This smells like they are going to take the new sensor for the 90D stick it in an R body and say it is the mirrorless replacement for the 7D. I would be fine with that. There is no specific RF-S mount needed and they really wouldn't have to build any APS-C sized lenses as people could adapt the existing EF-S lenses. That is what I do to shoot video on the R. This would give the APS-C base which is way bigger than FF a path forward rather than just giving them the finger which has been the plan so far.
I do wish they would change their crop from 1.6 to 1.5 with this move..