I still believe that this pokemon sun/moon deal is just an elaborate ruse, just to make us more surprised. Its not that far from zygarde theme, but think about it: why should we get something that unrelated to what we are getting now. The worst case scenario is that we will get sun/moon games, but those will be tied to the plot.

Also the most funny thing i find about this is that there are so many people who think that we are getting gen 7. Its not even the case of unresolved zygarde stuff - gamefreak has never been so hard working to introduce new stuff when they could milk their assets to death. Kalos is still usable and I can bet with my life that it will be used once again. They have an opportunity to get money for a game, that was released 3 years ago, like with every definitive edition.

Sun/Moon makes little sense here. It may happen, but i doubt it.