Re: Joss Whedon's S.H.I.E.L.D to ABC!
Perhaps the name of S.H.I.E.L.D. designated a new official description for a department that had already been in existence, with a different title but similar form and function. (there are plenty of real-world examples)
For those determined to contort yourselves into knots so as to include every minor production flub as gospel, and shoehorn it into "cannnonnnnn": STOP. I don't have all day to waste on here; I quite like enjoying real life thankyouverymuch.