The issue here is... I would rather prefer a Toyobaru with the same Subaru boxer engine but being this time an oil burner with much increased low end torque and fuel economy (hence much lower emissions) than this:
Hotter Toyota GT86 could go hybrid
That's the reason why the Volkswagen Bluesport is so relevant and why the Japaneses being so committed to the electric car option, mainly Toyota, makes that ideal solution so unlikely... but if you are shortsighted it's hard to realize this.