A new zoom
A new EF 24-70 f/4L IS is on the horizon. It appears something was lost in translation in regards to yesterday's rumor. While a prototype of the 2.8 version in IS form exists, the f/4L version is what will be coming to market.
No announcement date is known. Remember we reported on the EF 40mm f/2.8 pancake 4 months before it was announced. I do not have a solid announcement date, so it could be a while off.