The new Rescue Bots cartoon isn't expected to start until 2019, and toys for that cartoon aren't likely to come out until then as well, so it shouldn't be too much of a surprise that Hasbro will still be releasing Rescue Bots toys during that year gap.

Three new ones just found on the Entertainment Earth site, include Epic Optimus (the last of the main cast to be released as a non-transforming Epic toy), a "Rescan" Heatwave as a race car (like the Flip Racer Heatwave race car), and an unknown Bumblebee called "Rescue Guard" (probably another unusual one like the Dragon Bumblebee from 2017).
The Rescan wave also has the Optimus from the 2016 trailer set on its own, which looks to be exactly the same as the 2016 release.