I'd be surprised if it weren't one of the next 2 EOS R. The first may have an 83 megapixel sensor, dual cards and possibly ibis, the follow up a hybrid that take EF and RF natively. The new 1 DX iii supposedly allows you to keep the mirror up so sort of a hybrid. I just don't see Canon or other camera manufacturers spending a lot of development dollars on DSLR technology going forward.
Maybe but aren't DSLR's half of the camera market? Do you think they will just say nah someone else can have that?