i don't see a "7D class EOS R with crop sensor" but expect Canon to keep EOS R series "FF only". It is all about R mount, which would be "wasted on a crop sensor".
i expect 2 mirrorfree cameras launched in the direction of "80D / 7D owners":
A) "EOS R7" / FF / 1799 - same as 7D II launch price
B) "EOS M7" / APS-C / 1499 - same as Fuji XT3 launch price
A) FF sensor "EOS R7"
will also take EF and EF-S lenses with any of the 3 adapters and have a "true crop mode" with less MP but faster fps. Simply a question of CPU/DIGIC and firmware. No need to "physically hobble" R series with an APS-C sensor.
B) APS-C sensor "EOS M7"
some people seem to only think of "M50 size and performance", but it is just a lower tier model. Canon will also (have to) bring a new "higher end / flagship" EOS M model soon. M5 is urgently due for replacement - I don't think Canon is selling many M5 these days. It was "eaten alive" by better specced, lower priced, more compact M50.
While more compact than EOS R new "top model M7" could have a slightly larger body than current M5 so it can fit strong LP-E6N power pack plus a somewhat bigger grip and a solid user interface with useful wheels, dials and buttons. For specs/performance just look at Fuji XT3. It beats 7D II and D500 nicely.
* e.g. a APS-C sensor with eg 28 MP
* 12 fps without any small print limitations = full AF tracking and AE for every frame
* top notch DP-AF incl. eye tracking
* top notch EVF
* fully articulated screen
* wheathersealing in line with 7D II
* EF-M lenses natively, EF and EF-S via adapter [... not RF - for those Canon wants us to spend more money and buy EOS R
];
"M7" would/will meet Fuji XT3 and upcoming new Sony crop MILCs - A7000/A6### head on.
By offering A) plus B) Canon can effectively combat competition, strengthen both EOS R and EOS M product lines and nail the coffin shut for mirrorslapping EOS crop sensor cameras. No 90D, no 7D III. not needed any longer. M50 effectively killed xxD/Rebel slappers. "M7" will kill xxD and 7D class.