I think it's worth noting that of all the first party full frame 70-200/2.8 lenses with image stabilization (and I hope we can all agree that this is a super-popular focal length and aperture), Canon's EF 70-200 f2.8 IS II is by far the best priced, and it's an excellent lens, with great image and build quality.
These are non-rebate/non-sale prices from Amazon.com:
Canon - $1950
Nikon - $2590
Sony - $2600
Keep in mind that Canon rebate prices are significantly less than that -- I think I bought mine brand new at CAD $2,100 from a camera store, which is about US$1,680. That's nearly the price of the Sony 70-200/f4, at $1,500.
If there is a new premium 70-200/2.8, I hope they keep the Mark II, as I think it is an invaluable, super-useful part of any Canon shooter's kit, at a really decent price -- comparatively speaking, of course. There is the added benefit that these list used at less than 10% off of Boxing Day prices, and they sell pretty quickly. In fact, the reason that I bought mine new was that used asking prices were so close (and higher than refurb prices) that it really didn't make any sense, for me.