your friend may have all the numbered pairs (1-22) but he doesn't have every pair they made. He doesn't have the china's i posted above, nor the special laser 3's made only for MJ for his birthday (only fakes were released to the public in china). Not to mention the ridiculous amount of colourways they've released of each pair and player specific color/numbered shoes, and the crosstrainers ectetera.
all 23 shoes are coming out next year in some form. although i don't like many of the designs between 12 and 19, i'd still love to feel them on my feet (yeah, i'm a little obssessed).