Nintendo will be releasing the new Pokemon Sun and Pokemon Moon at the end of this year. There is not a whole lot of details on the changes that we will be seeing in the new Pokemon but as usual, we can expect to see a few new Pokemon including new legendary Pokemon.
Nintendo has not announced what the new Legendary Pokemon is going to be yet but Game Freak did file two new trademarks possibly revealing the names of the new Legendary Pokemon.
Game Freak trademarked both Solgaleo and Lunaala which does match the name of the upcoming Pokemon game. Sol means Sun and Luna mean Moon. We still do not know how the new Pokemon will look like and we will probably only see them when we get closer to the release date of the game.
The new Pokemon Sun and Moon will be released for the Nintendo 3DS.