In terms of speculation about what Pokemon is doing with Sun and Moon, I've actually been following this one Youtuber who has a rather interesting theory. He believes that Sun and Moon is essentially the "end of Pokemon", and that the entire series is getting a reboot. Of course, a lot of what he is saying is speculation and some of it is a stretch, plus the videos he releases explaining his theory are pretty hammy, but still. He presents a pretty convincing argument.