The question is, is the 14-24 gonna be good enough to make the 14mm prime obsolete? Or will Canon purposely make it lesser to prevent this?
Well, the Nikon 14-24, @14mm, with a Canon EF adapter, has already made the Canon EF 14mm 2.8 L II obsolete.
Canon has got only one thing to do, really, and that is not what you are suggesting. But I am not even sure Canon is capable of making a new EF 14mm 2.8 III prime which is better than the Nikon 14-24 @14mm.
Canon sure is taking their time though, so let's hope they prove me deadly wrong!
Well, I'll just keep posting pictures taken with my flagship Canon cameras 1DX and 5D3, paired with a 14-24mm lens from their main competitor!
My corner soft, CA, vignetting EF 16-35 2.8 II lens was sold years ago. Only comfort is, this lens is not worse than the newer Nikon 16-35 f/4 optically.