Lumia 920: Is there another flagship phone coming from Nokia early next year?

I find it interesting that the 920 is such a large update from the Lumia 900 and yet has such a small numerical increment in terms of its name.

Could this suggest that a even bigger upgrade (perhaps a Lumia 1000 with a Pureview oversampling camera sensor) is on its way early next year and the 920 is just testing the waters?