Pokémon Get TV has just finished airing in Japan and as expected has brought with it a little bit of footage from Pokémon Omega Ruby and Pokémon Alpha Sapphire. The footage showed Groudon and Kyogre getting ready for battle and activating their abilities. Said footage has been uploaded to the official Pokémon YouTube channel and can be seen below:
After the footage was shown the Pokémon Get TV team pointed out the differences between Groudon and Kyogre's original artwork and the artwork being used for the Pokémon Omega Ruby and Pokémon Alpha Sapphire box art. This could be implying that the new artwork being used for the two is showing them in different forms or Mega Evolved, but only time will give us the answer to that.