In the second half of 2013, Canon will announce several new wide-angle zoom lenses include the long awaited Canon EF 14-24mm f/2.8L USM.
The release date for EF 14-24mm f/2.8L could be in Q4 or sooner or later.
There also mentioned two other wide-angle zoom lenses to be replaced.
And the other is Canon EF 17-40mm f/4L USM
There also a new wide-angle zoom lense EF 16-50mm f/4L IS USM in test and could be also announced.
Canon EF 14-24mm f/2.8L USM on Facebook