The Japanese (army) air force had the Navy A6M zero equivalent..... that would be the Ki-43.
Just like the Navy A6M major variants that spans entire war period:
A6M2 (early war)
A6M3 (mid war)
A6M5 (late war)
... the Ki-43 should be just as covered accordingly in this game:
Ki-43-I (early war)
- I think this variant is needed in _AvA_ scenarios because I think the mid war Mk II that will have right now will be too much against early war historical opponents
- Main opponents: early P-39, early P-40, Buffalos, Hurricane, Chinese I-16's
Ki-43-II (mid war)
- Main opponents: mid war P-40, P-38G, spitfire V
Ki-43-IIIa (late war)
- Main opponents: late war P-38, Spitfire VIII
I'm sure HTC making significant sub-variants of these Hayabusas won't cost them that much
(besides Ki-43-I) There's little difference between Ki-43 (II and III) appearance wise, but each mark represents evolution in performance for early/mid/late wars.