We are still in the second episode of Zenkaiger and Telasa had already announced the Spin-off! This Spin-off will have feature Red colored Zenkaiser which is currently dubbed as "Akai Zenkaiser" (Red Zenkaiser). It is not known whether Red Zenkaiser is the special form of original Zenkaiser or is it someone else.
The title of the spin-off is currently called "Kikai Sentai Zenkaiger Spin-Off" which start streaming from March 21 and end on March 28. So it's just a two episode spin-off.
More information about this Spin-off will be announced on March 20.