Unless the world ends in the next few months, GF won't stop making another generation til the day they won't make alot of cash with it anymore.
You guys must remember that the psy trio, dimension trio and Arceus are thought of as deities (and even creator of universe) in just one region of the known Japan islands-like Pokemon world, and there is still another half of Japan that hasn't been used (+ all the other world if needs to be).
I can without problems see the next gen happening between Kanto and Sinnoh or Johto and Hoenn, where people live who also know stories about ancient mystic deity whatever pokemon, whom they would believe to have exceptional powers which could have been used for the creation of their region etc.
Cause IMO those Pokemon like Groudon/Kyogre and Dialga/Palkia/Giratina, didn't actually create anything as big as a region. That's just the result of few people having seen a Palkia bend space around it a bit, telling other people, which come up with a story that would explain the past etc...
This is backed up by the fact, that only some people in Hoenn know about Groudon and Kyogre creating the land and the sea, while logically they would have to have created also all the other parts of the world, not to forget no one could have been a witness to this event. And from such a myth I'd assume Kyogre to be a really intelligent creative being, while after awakend in RSE it goes on rampage like a freakin Godzilla or something.
I don't see the contradiction in the Mew/Arceus debate.
It's actually quite fitting and perfect.
We know the following about them:
-many scientists believe Mew to be the ancestor of Pokémon (because of having genes of all other Pokemon in it's DNA)
-myths in the Sinnoh region talk about Arceus creating the universe
It really reminds me of the real world creationism/darwinism dilemma, whereas Mew would represent the theory of Evolution, and Arceus a supernatural god.
But the truth is that the Pokemon universe was created by people from the real world hehe..
