We'll have to wait until some of our Japanese-fluent readers give us all the details from the article, but from what we gather, the MR-S would probably use a specially developed version of the Toyota Prius' hybrid powertrain.
The magazine's article is accompanied by an artist's impression on how the MR-S could like. Judging by the air-inlets at the back, the proposed MR-S most likely features a mid-engine, rear-wheel drive layout.
If true, this would make the MR-S a sportier proposal than the front-wheel drive CR-Z.
As we said before, there's nothing official about the existence of such a model, but we can't say that it sounds improbable for Toyota to develop a second sports car after the FT-86, especially if it's a smaller, lightweight hybrid.
Source: Best Car