Is Power Rangers even still on the air?
New episodes start February 7th.
What happened is that ca. 2002, Fox was looking to unload the Family Channel (which it had bought just a few years earlier) and when Disney came calling they threw in Saban - who by that time had become the network's in-house studio - to sweeten the deal; this is why Disney has the rights to RiD instead of Hasbro.
Disney quickly relegated all of Fox' old re-runs to filler spots in order to pad out the lineup on ABC Family and Toon Disney, but they were left with the fact that Power Rangers Wild Force was still in production and the production company still had a contract with Japan that allowed them to adapt further seasons of Super Sentai.
The end result was a wildly unpredictable series of starts and stops in the history of the franchise. For example, while people loved Ninja Storm and Dino Thunder, I have yet to find a fan who will admit to enjoying Magic Force.
In the wake of RPM a dispute apparently broke out between the people on the show and the execs at Disney; Disney increasingly came to regard the show as disposable (some ABC affiliates didn't even broadcast it), and the production staff came to resent Disney's constant meddling. When Disney got the bright idea to give the original series the G2 treatment rather than spring for adapting the then-current Sentai series, Haim Saban finally said "hug this" and bought the rights to the franchise back.
He immediately began broadcasting the vintage episodes online at the rate of one per day, with the idea being to buy time while he began adapting the version of Sentai that Disney didn't want to do. Nickelodeon was more than happy to pay what Saban wanted for the broadcast rights, and so that's the show's new home for the time being.
I sort of wish the original cast could be gathered up for a sort of legacy show with the first and last groups.
Given that Thuy Trang is dead (she was killed in a car crash shortly before 9/11), Amy Jo Johnson wants nothing more to do with the series (she blames her comparatively long tenure on the show for her difficulties in finding "serious" work after she left), and David Yost is still bitter over how he was treated, that's not very likely.
IIRC, the only early cast members to actually come back and do work with the show outside of one-off specials are Jason David Frank (Tommy), Johnny Yong Bosch (Adam), Paul Schrier (Bulk), and Jason Narvy (Skull).