The first Canon full frame mirrorless camera is rumored to be announced in the second week of September. And as rumored before, it will have a compact size, like style of Canon EOS M mirrorless cameras, and it will have a new lens mount.
According to latest rumors from CR, there is a chance Canon will also announce a new DSLR sytle full frame mirrorless camera in next several months, and it will have native EF mount.
via: CR