We're told that Canon has scrapped development of at least one DSLR in favour of a mirrorless option. We weren't told which potential DSLR has been scrapped, but it sounds plausible.
The same source said to expect 3 new APS-C DSLRs in 2019, but not to expect any full-frame EOS DSLR bodies next year. Though it was mentioned that the follow-up to the EOS-1D X Mark II is well on its way in its development, but not to expect the new camera until 2020 ahead of the Summer Olympics in Tokyo, Japan.
It was also claimed that Canon recently showed a roadmap in a marketing meeting that listed 3 unreleased EOS R bodies, along with 5 RF lenses. All of these were listed to arrive before Q2 2020. Though it's noted the date range for the announcements was quite broad.
As for the DSLR that was potentially scrapped during development? We'd put our money on the EOS 5DS line of bodies. We really don't think a DSLR sequel is coming for that series and that we'll get an EOS R body instead.