[ZeoRangerV]

I guess popularity is a hard thing to guage sometimes on a 37 year old show. While Gokaiger did a pretty good job of covering all the bases in its episode run, it undoubtedly paid more attention to the newer shows. The pre-Zyu stuff could be REALLY popular in Japan, but its probably easier to do the bigger tributes with props/characters they still have and shows the audience remember. While there'd naturally be adults watching, the main audience probably know much more about Magiranger and Dekaranger than they do Battle Fever or Liveman.

Jetman's tribute was a big deal because as far as I know it was the first time Gai was acknowledged to have died canonically.