There is definitely a market for a $2000 full frame camera.
Yes ... and the 5DII covers this market already.
It will also cover it during the holidays this year and in early 2013.
After that, the 5DIII will start dropping in price and in 18-24 months will sell (like hotcakes) for $2500.
When the price drops to that level (and below), it will leave room in the lineup for a new $3000-3500 body with 30+ megapixels.
So, as other posters have said, no room for a NEW $2000 FF from Canon right now - and in the next four-five years.
Who knows after that.
I think the appeal of buying a 4 year old camera will quickly wane with the wider public given that newer cameras will have more capabilities. The 5D2 may still attract xxD and xxxD upgrades but it won't attract new people to Canon.
Lets imagine it is now October 2012. You've got $2000 to spend on a new camera body. You don't own any other SLRs or lenses. For a lot of people, a 4 year old 5D2 is not going to be anywhere near the top of that list simply because it is now 4 years old.
I'd put the price range on this camera at $1999 - $2399.
The price will probably have more to do with the new xxD price than that of the 5D2 or 5D3.