I think saban should wait a couple of years to move there.

The filming location has nothing to do with any of that. If the shows arent good its because the producers,writers and directors arent doing their best. Moving back to the us wont change that.

So it means he will never will back to usa ?

Not as long as it's cheaper to film in New Zealand, what with the lack of union fees and such.

That's means forever ?

no but it could be 10 years or more depends if NZ ever unionizes and and be more expensive then in the US.

chances are they will just move to some where else that is cheaper to film in

But we don't know if we will have power rangers in 10 years and we don't know if saban will be alive until there.

Power Rangers won't die.

But what about saban ?

It's one of the largest brands in the world for marketing toys and television shows to young boys & to extent young girls as well. There is no danger of it disappearing.