https://www.youtube.com/watch?v=8FJEyj6ctTQ
Main site is now open: http://www.pokemonrubysapphire.com/
Details for Diancie distribution in Pokémon X/Y will come soon as well. Mega stone for Diancie is in Omega Ruby and Alpha Sapphire.
Note: Every other country other than Canada has a specific release date on the official site.
Canada: November 2014
US: November 21st
EU: November 28th
Australia/New Zealand: November 21st
EDIT: One of the images was changed because it confirmed secret bases returning.
Look at the black indent near the top-right.
Main site is now open: http://www.pokemonrubysapphire.com/
Details for Diancie distribution in Pokémon X/Y will come soon as well. Mega stone for Diancie is in Omega Ruby and Alpha Sapphire.
Note: Every other country other than Canada has a specific release date on the official site.
Canada: November 2014
US: November 21st
EU: November 28th
Australia/New Zealand: November 21st
EDIT: One of the images was changed because it confirmed secret bases returning.
Look at the black indent near the top-right.