There has been a flurry of sensor talk over the last few weeks, though we haven't posted much about it because most of it cannot be confirmed with any sort of certainty.
We're now told that a brand new 32.5mp APS-C sensor is slated to arrive in an EOS M camera as well as in a DSLR sometime in 2019. This comes shortly after being told that an all-new 24mp APS-C sensor was on the way.
The source claims they're “100% certain” that this sensor is coming in 2019.
I cannot confirm this information, so please take it with a grain of salt. It is rated [CR1].