The expected new M camera design could be the Hermes Leica M7 which was already displayed in Tokyo 2 weeks ago (see report here). Those two pictures were taken from shphotoshop.de (thanks for the tip Gyorgy):
Each of the models will be limited to 100 pieces, price: 9.500,00 €.
This model is not to be mistaken with the Leica MP Hermes edition.
And the previously reported Leica M7 Hermes photos from Tokyo after the break: