[JAS84]

Kyoryu Sentai Zyuranger was actually only one year older than Mighty Morphin Power Rangers, they were adapting a 1992 series in 1993. They always adapted the previous year's Sentai until 2009 (RPM, based on 2008's Engine Sentai Go-Onger), then when it moved to Nickelodeon in 2011 and the seasons became shorter, they started taking two years to adapt one, resulting in some being skipped and adaptations no longer only being one year behind the source material. The 2021-22 series Power Rangers Dino Fury was based on Kishiryu Sentai Ryusoulger, which is from 2019.