We're again being told that an image stabilized 24-70mm f/2.8L lens is coming. This source claims there has been a lot of internal discussions whether or not to release this lens for both RF and EF mounts.
I guess the argument could be made, that if you want people embracing the EOS R system, then providing compelling lenses not available in EF would be an interesting way to make that happen.
The flip side? Ticking off the millions of EOS DSLR shooters that have no immediate plans to move to a mirrorless system.
Our bet is we'll see both an RF 24-70mm f/2.8L IS and an EF 24-70mm f/2.8L IS some time in the next 12-18 months.