I wonder why Canon don't produce these lenses which would be logical to have. Let say 14-24, 2.8. I think that lens exactly would be sold very well.Agreed! This is a great lens in the nikon version.
I am going to go out on a limb and say that Canon is probably planning a one-up lens in this area (like the 200-400+1.4x).
The 14-24 f/2.8 cannot take filters and has a short zoom range. It is also susceptible to flares (yes, I know, everything else is solid gold).
The 16-35 f/4 VR is not that stellar, but provides the convenience of longer FL range and filter threads.
I'd say Canon is going to bring out something that gets rid of all the shortcomings.
No, it won't be cheap. Not even close. But people will lust for it.