Sony is getting ready to release a new 70-400, and it looks like the price of the new lens will be a whopping $3000!
You can see a blurb about the price at the bottom of this post: http://www.sonyalpharumors.com/sr5-full-a58-and-nex-3n-specs/
I wonder what the eventual 100-400L successor will cost
The 70-400mm I is one of the worst lenses ever made. I doubt they can put out something decent.