Interview with Arakawa Naruhisa about Kuuga novel
 

Blog owner extracted the part where the host and Arakawa talked about Kuuga in the radio show.
The interesting part is about the plan for Godai in the last episode for the TV series, and how Arakawa wrote the novel by using that iffy conclusion.

http://sky.ap.teacup.com/uzumaki_kuu/2849.html

Currently I am a unable to do the translation of the material.
If someone is interested please do so.