Or not even a actor/actress that played in Zyuranger returning. The other Sentai series being Denjiman, Sun Vulcan, Goggle V, Dynaman, Bioman, Changeman, Flashman, Maskman, Turboranger, or Fiveman (& probably Battle Fever J) didn't get tribute episodes, either, but at least we got certain actors/actresses from each of those series to come back for it.
Like I said in another thread, I just got to laugh at the PR fans. They're the ones who keeps thinking something like, "Why the hell aren't they having any returning actors/actresses from Zyuranger show up?! Why isn't there a tribute episode for it? I want my MMPR fix!", or "Why aren't they showing love for MMPR?", etc., even though Gokaiger was very clear from the start that the show wasn't exactly targeting towards the western audience.
That's what the Gokaiger adaptation is for in a few years from now.