Do people actually want Ray Park to play Danny Rand? For one, he's at least 10 years too old for the role, for two (is that even a real saying?) the guy can't act to save his life (Ecks vs Sever anyone) and for wanting him to stunt double for some other actor is kinda silly, seeing as there are some phenomanly talented new guys coming up through the ranks of screen Martial Arts/Stunt Work/Acrobatics who could geniunly pull off some superhero kung fu shizznat.
Personaly I think casting an unknown would be the only way to go. In the past I've said Ryan Phillipe, what with him being a good actor, having the right look and having background in Tae Kwon Do, but even in his thirties I think he'd be a little too old to carry a franchise that would be so physicly demanding.
Until the right guy for Danny Rand comes along (a good martial artist with the chops to carry a film), I don't wanna see this movie moving forward, as much as I'd love to see it happen one day.