We're told that the 2nd half of 2019 will be more about updating older product lines and launch some new lines such as the ZV-123 instant print camera.
This is what we're told to expect.
Three new G series PowerShot cameras. The PowerShot G7 X Mark III has been a bit of a unicorn around these parts, but it's obvious that it's coming. We can also expect a PowerShot G5 X Mark II and a PowerShot G9 X Mark III.
As far as DSLRs, we're told to only expect amateur level cameras such as Rebels and the EOS 80D replacement.
The Cinema EOS lineup will see an update, along with new camcorders and a new camera type for video shooters.
Nothing major in the way of the EOS R system, no new cameras and no major lens announcements. Though the source did say that a new Speedlite focused on the EOS R system is in the works.
The same source also said that the Canon Rumors readers would be disappointed to know that a “professional level” camera such a replacement for the EOS 7D Mark II or EOS-1D X Mark II isn't scheduled for this year.
I will add that I have heard nothing in regards to the EOS M lineup. It wouldn't surprise me to see Canon ride out the EOS M50 for the rest of the year.
Early 2020 is apparently going to be a major release period for Canon.