[Shin Henshin]

Ever since Gavan's return in Gokaiger I feel Toei understands that their Metal Heroes line-up can be really popular in this age but need a setting outside of cameos and team-ups with Sentai and Riders.

I believe Space Squad did well, right? Perhaps it could be a good move to take the concept and expand it into its own sort of Metal Heroes-comprised Justice League of sorts. Considering they described the previous films as Japan's version of The Avengers.