Granted, that's a point and yes, Nomura called it "inofficially" KH 0 two or more times.
Even going with the title "KH 0" though would have buried the complaint about "no numbered title" which many parts of the fandom seem to be so infatuated with, lol.
("It's not a true KH-game if it isn't a numbered title!") *ggg*
Well, people complain about a lot of things. Personally I am looking forward to FINALLY getting to try out Re:CoM, the Final Mix things in KH1 (an additional boss, right? Or is there more I've forgotten?), see the new scenes from Days etc. Not to mention, that Versus has to be finished before KH3 starts getting into production, and Versus looks badass. A lot to look forward to