Since I bought a 16-35mm L last week, the new lens will almost certainly appear.
I wouldnt be mad about it if I were you. Even IF there will be announcement for 14-24 f/2.8 L I doubt it will be availabe right away. Maybe next year, maybe even next august. We have learned that lesson with super teles and 1D-X. 24-70 f/2.8 L II availability has been pushed too, couple of times.