I mean,someone could fight like him.

I'm pretty sure he has "Zek'Kya!" trademarked.

As a more honest answer I don't know what you mean. There have been plenty since him with martial arts training, in fact every season before and since. So I don't know exactly what you mean by fights like him.

His fighting style was not unique to the franchise though.

But he's experience is.

What you mean pre or post Power Rangers? Because almost every Ranger actor/actress has martial arts training, hell its a requirement really for auditions. Post PR, I gues you mean the MMA he did for a bit? I guess if after their time as a Ranger they want to do that, I guess we could have 'another JDF' as you first put it.

Seven, I understand you want to ask questions to spark discussion. They are fun sometimes, but please start putting more wording into your first post. So that everyone doesnt reply for two pages to you trying to understand what you mean. :)

His experience after being a ranger has no effect on the show. The only thing his experience now helps is to sell spots at his martial arts school on the fact that he was the green ranger. Doesn't help or hurt the show, so I see no reason why another JDF is needed.

If you are wanting a guy to have a ponytail and scream "E-sick e-yah!" overtime he kicks and punches, that can be added with ADR in post production.

I just watched the opening narration to Dino Charge. Has anyone ever noticed that every season they say the same thing? Every seasons power source is the "ultimate" power in the universe. So.... what does this truly say about the series' before? And what does it say about this current power source until the next series? :lolol

Should the matial arts comeback like a hobby ?

Nah. I like the rangers doing their own things outside of the suits.