Each Zenkai's design is based from a previous Super Sentai's mecha:
- Zenkai Juran's is based off Shinka Gattai Daizyuzin from Kyôryû sentai Jûrenjâ (1992).
- Zenkai Gaon's is based off Hyakujuu Gattai GaoKing from Hyakujû sentai Gaorenjâ (2001).
- Zenkai Magine's is based off Majin Gattai MagiKing from Mahou sentai Magirenjâ (2005).
- Zenkai Vroon's is based off GoGo Gattai DaiBouken from Gôgô sentai Bôkenger (2006).
Contrary to previous seasons, Zenkaiger treats each Super Sentai as coming from different worlds.
According to producer Shinichiro Shirakura, the working title for this season was meant to be Sentai Sentai Sentaiger.
Unlike most Super Sentai series, the title card appears at the start of the opening credits.