Now that Mazda seem to be getting a good hold on making the rotary engine do good things, it could be a time to assess how a small capacity rotary engine might work.
The recent Renesis (sorry) was perhaps slightly limited by retaining the physical characteristics of the now old 13b engine. Without taking anything away from it, the Renesis is a modified 13b and development budget probably dictated that.
If Mazda were to introduce a smaller capacity rotor, perhaps 1/2 to 2/3 the size of the current Renesis, could the engine become a viable passenger car engine?
A smaller individual rotor capacity could enable Mazda to take advantage of the modular nature of the engine. 2 rotors of 300cc each could power a Kei car, 3 rotors could power a Mazda 2, 5 could power an Mx-5
A smaller rotor might also make the engine more efficient with less mass and a much smaller combustion chamber. Perhaps even a single spark plug would be needed.
The engine would become slightly longer and it's diameter would change. Don't tell me it would be more complex than a current generation multi cam, vvt/vvl V6 engine!
Surely Mazda's knowledge of the Rotary engine could make this a possibility. Could it be the optimal use of a rotary engine, to use it throughout a range of vehicles in different formats based on the same sound foundation?