Most annoying product launch ever (assuming it actually launches)...
I agree with you.
May be a non launch May never come out. Canon could cancel the lens at a time before it is introduced
I doubt that for two reasons.
First, the lens was already used by photographers in the Olympic games. That means most of the investment in the lens was already done, and Canon has an interest to manufacture the lens and cover the expenses.
If the lens turns into vaporware, that would be bad PR for Canon. Yes, this lens had a small target audience to begin with, and most photographers (including me) haven't considered buying one to begin with, but it would make customers suspect every announcement and delay.