Again, I am literally friends with Kojima. I know exactly what's going on, and that's how I gained his attention.
This isn't even just theory at this point. This is me becoming friends with Hideo "fucking" Kojima through my insanity. We played overwatch together and he gives me hints sometimes over twitter. :3
Metal Gear Survive is also a Kojima title, though he's hiding that fact to make people angry. The Phantom Pain literally featured several zombies as boss battles, but Kojima knows that his fans only digest what the news tells them, not what their eyes see.