We're not going to see any more major product announcements from Canon in 2019, outside of the official announcement of the RF 70-200mm f/2.8L IS USM, which we expect in the next month or two, with the availability of the new lens coming in December.
We have been told that Canon has a major announcement planned on or around February 11, 2020, which would come ahead of CP+, which begins at the end of February.
A second source said “your readers should start getting excited for Photokina”, which is happening in May. Unfortunately, that was all we were told and we'll have to wait a bit longer to find out what is possibly coming.
We expect both the high-megapixel EOS R body and EOS-1D X Mark III to be announced in the first half of 2020, along with a lot of new RF mount lenses.