The rumor comes from CR. Not a new rumor, and a plausible one. It’s said that three prototypes of the next iteration of the 35mm f/1.4L are already out in the wild, given to selected photographers for testing purposes. The new 35mm should then be announced after Canon has started mass production and shipping of the 24-70mm f/2.8 II USM. Finally, the 35mm f/1.4L II USM should be announced in 2012 and be available for the masses in 2013. Last month I reported about a patent that most probably refers to the new 35mm, check it to know more about the optical properties of this lens.
The actual 35mm f/1.4L USM has a price tag around $1,344 (click on the shop name to learn more): Amazon USA, Amazon CA, B&H Photo, Adorama, Digitalrev, KEH Camera, eBay US, Canon USA, Canon CA, BestBuy