EF 24-70 f/2.8L IS lens is a long time rumored lens but the current news posted over the web gives a little information that the Canon is still busy on this lens development.
The major thing that stopped Canon from its released is the lens larger size with image stabilization and that why Canon launched smaller EF 24-70mm f/2.8L II.
However, Canon is still in Dilemma to select the final design from atleast three prototypes. We are insisting to assume a BR element would be part of the development because the IS being worked on for the lens will provide better performance than anything currently in the Canon lineup.
So we think it would better if we don’t think about this EF 24-70 f/2.8L IS lens for the next 18-24 months until the Canon completed its complete work and announced.