As rumored before, Canon currently has several new cameras in testing. We may see first product announcement in the first week of September. The upcoming Canon full frame mirrorless camera and Canon EOS M5 Mark II are likely to be announced. Both cameras will be shown at Photokina 2018 on September 26.
The first Canon full frame mirrorless camera is described as an “EOS 5D Mark IV in a mirrorless body”. So we may see features that 5D Mark IV have. You can take a look at rumored specs of Canon full frame mirrorless cameras.