I'm anticipating an EF-M shake-up in 2019. I think Canon is possibly making an M7 with this sensor, which will launch alongside the M5 MkII that comes with a new 24-26MP sensor. Both these cameras will use the E-17 battery used by the current EOS RP, M5, M6, 250D.
Canon M7:
This M7 will be the EF-M flagship, effectively replace the 7D MkII, and add some weather-sealing as well as a top display. Such a camera will also make room for some new M-mount lenses down the line that wildlife shooters will appreciate since they will be a better fit for this larger M body. This will also be the first M camera with a battery grip option. Regardless, I expect the now patented EF-M 15-130mm f/3.5-6.3 to launch with this M7 as a kit option too. Metal mount of course, unlike the current 18-150mm. The M7 will be pricey, costing more than the EOS RP.
Canon M5 MkII
As for the next M5, it will come with a vari-angle screen, new 24-26MP sensor, and all the dials found on the existing M5. It won't be enough for existing M5 users to upgrade but it will seriously target the XT-3 and A6400 at $1300 with new 16mm-50mm kit lens. The elephants in the room will still be the lack of IBIS and cropped 4K but it will a nice upgrade for those looking to step up from an M50.
Photokina 2020:
- 90D with the new 32mp sensor, still a DSLR with headphone jack
- M6 MkII
- M200
- Wide angle EF-M prime
- 50mm EF-M prime without IS but hopefully with f/1.4