Mazda patent clearly shows a three-rotor, mild-hybrid powertrain, but we're still not getting our hopes up.
There have been rumors of Mazda reviving the rotary engine on a regular basis since the RX-8 ended production in 2012. The company itself has been pretty quiet about the rotary engine, except as a planned range extender in an upcoming plug-in hybrid version of the MX-30. However, Mazda has filed a patent application for a triple-rotor hybrid powertrain. And unlike in the MX-30, it not only appears to be the main propulsion unit, but it's also configured for a rear-wheel-drive layout.
Unlike those Japanese patent filings, these illustrations aren't nearly as detailed. They are likely a placeholder for something that Mazda might, one day, if market forces and planets are aligned, want to do. Of course, the gulf between that and a production car is incredibly wide.