I don't see any significant price drop for years... maybe not until the next 5D (mark IV or whatever) gets close to being released. Might drop about $100 by next year, but that's chump change. The Mark II came out at $2700, I think, and I bought one a year-and-a-half later for $2400.
However, I would guess that there's a reasonable chance that Canon will offer one of their rebates within a year or so - perhaps around the holiday season or early 2013
I hope the glowing reviews and the specs for the 5D III live up to the hype. If so, the 5D III is definitely on my must have list. Just want to wait a while to justify the cost.