I get the impression, though I could be wrong, that sailing ship models don't have quite as much appeal to the Far Eastern home market (which, I've heard, is still the main market for manufacturers there and the main influence on their choice of subject; exports are secondary) as they do in North America and (especially) Europe. Imai seem to have been a "one-off". Whatever the case, I don't think there have been any new sailing ship models from the Far East other than Trumpeter's Cheng Ho treasure ship and (rather half-hearted) Mayflower.
My #1 list of suggestions for Airfix would still be:
HMS Warrior, 1860 (1/200?)
Mary Rose (1/144?)
SS Great Britain (1/144 or 1/200?)
- especially HMS Warrior (a personal favourite!) All 3 are museum ships in Britain and, other than Caldercraft's excellent Mary Rose wood kit, models of them are nonexistent other than cheap wood souvenir models. A good quality, reasonably affordable kit would surely sell well in the museum shops at Portsmouth and Bristol!
There are plenty of other subjects I'd like to see (like HMS Shannon and Vanguard, as mentioned by warshipguy) but the above 3 would combine good market appeal with subjects that really deserve to be available in kit form!