From what I've seen in the past, prices of a existing model drop severely before a new model is announced, and then rebound afterwards.
However, the 5D MK II has held its value very well over the years and may very well go down a few more dollars if a new $2,000 model comes out. However, Canon has not been shy about pricing of new models, so I'd expect more like $2700.
Now this seems a tad more realistic for me. I seriously would be blown away if canon put out a new entry level FF for 2k$ it seems far to inexpensive to me. I couldnt imagine the entry level FF would be on par or have less features than the 5D2 it would have to be an upgrade from that. I think you're right 2700$ seems correct unless the 5d3 is going to be 3000$ then who knows!