[806mtson]

I was thinking and, considering there are the sounds in the Mobilates for them, I think I know how they will release the Kikainoid Zenkaigers as Ranger Keys: Remold them from the "Megazord Keys". Remember that in Gokaiger X Go-Busters, there were these Ranger Keys used by the Mecha, Go-Buster Ace, Buster Hercules, Go-Buster Lioh, GoZyuJin, and GokaiOh to become the Legend Sentai Mecha Flash King, Daizyujin, RyuseiOh, GaoKing, MagiKing, DaiBouken, and GekiTohja.
Go-Buster Ace used Flash King's, RyuseiOh's, and GekiTohja's Keys, GoZyuJin used Daizyujin's Key, Go-Buster Li-Oh used GaoKing's Key, Buster Hercules used MagiKing's Key, and GokaiOh used DaiBouken's Key. They might base the Kikainoid Zenkaigers (Juran, Gaon, Magine, and Vroon) off the Megazord Key Mold instead of the regular Ranger Key Molds considering that they are based upon the Main Giant Robos of 4 Ranger Teams. They could even just slightly tweak the Molds for the Daizyujin, GaoKing, MagiKing, and DaiBouken Keys to more resemble the 4 Kikainoids.