Considering the lettering of Falcons over the years, the last few have shown the most change. Think of it:
XK, XL, XM, XR, XT, XW, XY.
XA, XB, XC, XD, XE, XF, XH (Ute) - at which point I guess we're full circle. That was a span of something like 25 years
13 years ago it changed to EA, EB, ED, EF, EL - why'd they stop there? Was it the 'Doh!' conflict with Holden names?
Then 3 years ago it changed AGAIN to AU - The 'AUssie' tag was a nice idea. But they'll be trying to disassociate with it now that it was a marketting flop. Having said that, AV does seem the super logical choice, and I don't know what they'd lose by using it, or gain by not using it.
Compare to Commodore:
, VC, VK, VL, VN, VP, VR, VS, VT, VU (Ute), VX
Half as many years of course, and only a few to go before the alphabet runs out on them. Perhaps that's why they want to change the name to something else - the rumour being Lumina.
Well, it's a good thing that Ford chose a good name like Falcon in the first place. And I much prefer the way Allan Moffat pronounces it - 'Fall Ken' - unlike the more common 'Fowl Ken'.
Boy, do I know how to waffle or what!