Spit balling Kamen Rider adaptation ideas
For my adaptation of Kamen Rider Build I would have it be set on an artificial Island made by the UN because the only way we get to Mars is via International cooperation and a island would be built to commemorate that. Also instead of just splitting the island up I would split the entire world up with only gravity keeping everything together. It would also be set somewhat in the future and it would be the first series in my Kamen Rider adaptation, saying that almost all of the Kamen Riders technology would originate from this system.
Foundation X would be the supposed saviors, taking credit for bring the world back together. They would also be behind a initiative that would send memories of Earth and Humanity into space in case it didn't work. These would become the Gaia Memories. Foundation X would also be one of the only organizations still trying to explore space after what happened due to the retrieval from Mars, thus they would have a school training children to specifically become astronauts.
Kamen Rider OOO would be a bit more tricky and feel less connected to everything else. I don't want Foundation X to really be involved that much with the core and sell metals. The original idea that I had for Kamen Rider O's though did include the three corporations vying over this new power source based off of alchemy and ancient alien technology. I think we could probably fit Foundation X as performing at corporate sabotage but that would be the only connection besides the crossovers.
Even though I want to have Foundation ask to be more Incorporated with the stories than they were before I still wanted to be up in the air on whether or not they're a bad guy until the last time they're involved which honestly might just be the Fourze adaptation. Maybe instead of the principal of the school being the big bad it is the CEO of Foundation X, maybe they are one in the same.