[Dr Kain]

Not to mention we have a completed set of the core DekaRangers.

Yes, CarRanger saved the series from cancellation, but that was only because of how poorly OhRanger did.

Zyu-Kaku was a risk Toei did with Sentai because their head writer had just left the franchise with Fiveman and Jetman was made as a love letter to Gatchaman. As such, they wanted to do something entirely new and they were all successful shows. They revolutionized Sentai. OhRanger did extremely poorly to the point it was going to be canceled, so Toei once again took at risk and just told the writers to have fun with the final series, which was so successful it brought the franchise back on top.

And funny enough, Turbo was the series that nearly canceled Power Rangers.