I know the price will be high, and I'm budgeting for that.
Yeah, I actually figured as much when I looked at your signature, but that was after I had already posted my comment : )
Anyway, here's an interesting thing: as reported on
NL, Foto Konijnenberg in Netherlands is actually already taking orders for the 200-400, although you can currently only order one
bundled with either a 1DX or 5DIII and they're showing it as "out of stock". If you substract the price of the camera from the bundle, it makes the price of the lens itself to be around €10,000, which means that it will probably be, indeed, $10,000 in the US. And it also means that the announcement should be right around the corner.