Update: Officially announced. Read more here
After a long wait, something about the two most anticipated canon lenses. they are The Canon 24-70 mm f/2.8 L (II) and 35mm f/1.4L (II). Probably canon is targeting CES 2012 Event. The planned date of announcement is on January 3, 2012. A week prior CES ( Jan 10-13,2012). Sounds logical and reliable. In addition, 24-70 mm f/2.8 will not have IS ( image Stabilizer) on it.