According to recently rumors on NL, the long awaited IBIS feature will coming to an EOS R camera in this year. And around 2020, Canon will release a new EOS R camera that have a 100MP full frame sensor, to replace current EOS 5DS/5DS R DSLR cameras.
Before the first EOS R full frame mirrorless camera released, there are also prototypes with IBIS floating around during testing. So it’s safe to say that Canon will embrace IBIS in an upcoming release in 2019.
The EOS 5DS/5DS R DSLR camera are rumored to be discontinued, to replaced by new EOS R mirrorless cameras. We’d likely to see these releases around 2020, before there are enough native RF lenses for landscape and studio shooters.