The answer is simple, and
The answer is simple, and Toyota already said it. Their stated plans are to extend hybrid and plug-in hybrid models across their whole model line up, and their Prius models will become a mix of plug in hybrid and pure electric (BEV) vehicles. There is zero chance that Toyota will throw away the Prius brand identification that they have spent decades to develop that links super economical, clean running and reliable electrified cars to Toyota and the Prius name. But it totally makes sense that they would extend that iconic Prius brand identity to BEVs and PHEVs alone.