Re: HERO System Martial Arts
What you're describing isn't Ninja Hero 3rd Edition. For starters, it would be 6th Edition, since it would be written for Hero 6E. Second, Ninja Hero is now part of HSMA, so it won't be a stand-along book. Third, Ninja Hero refers to martial arts campaigning in general, not just Asian-based games. So your Ninja Hero game could range from the Three Musketeers to the Seven Samurai. Finally, you're asking for what really boils down to something like "Asian Warrior Hero," which is probably not something Steve will write due to (IMO) a lack of market value to make the time and effort to create such as book worth his while.
Some of what you're asking for is in HSMA. There's a section on samurai and discussion is had of the Shaolin Temple.
As for the rest... I'd love to #4. I could even start with all of the NPCs I did for NH for 5E and all of the characters I submitted to Digital Hero. Oh, and one of those was Wong Fei-Hong.