(http://media.il.edmunds-media.com/porsche/panamera-hybrid/ns/porsche_panamera-hybrid_ill_ns_21111_196.jpg) Porsche says only that it will feature "the world premiere of a parallel full hybrid model" in Geneva.
Source: Porsche Panamera Hybrid Expected To Debut at 2011 Geneva Auto Show (http://www.insideline.com:80/porsche/panamera/porsche-panamera-hybrid-expected-to-debut-at-2011-geneva-auto-show.html)