Toyota’s Frankfurt exhibits will be mostly hybrid-centric, or at least that’s what they feel comfortable letting us know in advance now. Two new hybrid concepts will be on show.

First is the Auris HSD Concept shown above. It’s essentially an Auris with Toyota’s HSD hybrid system. The Auris is the hatchback version of the Corolla so it would not be far-fetched to think that we could see a HSD Corolla in the future.

Next up is the Toyota Prius Plug-in Hybrid Concept. I think it’s quite easy to figure out what this is based on the concept’s name. A Plug-in Hybrid basically allow one to charge the hybrid’s on-board batteries from a power source rather than just through brake energy regeneration.

A true bridge between hybrids and full EVs, a plug-in Prius much like this concept will begin field trials in early 2010. About 150 units will be leased to selected fleet customers.