according to Pokeani, today's おはスタ (a TV programme) released a trailer and the title of Movie 11:
「劇場版ポケットモンスターダイヤモンド&パール ギラティナと氷空(そら)の花束」
『Theatrical Edition Pocket Monsters Diamond & Pearl: Giratina and the Bouquet of the Ice Sky (or Icy Sky?)』
Narration of the trailer says:
the battle between the Gods is not over yet (the scene of Dialga & Palkia battling), new God-like Pokemon now wake(s) up (the scene of Giratina debuting).
「劇場版ポケットモンスターダイヤモンド&パール ギラティナと氷空(そら)の花束」
『Theatrical Edition Pocket Monsters Diamond & Pearl: Giratina and the Bouquet of the Ice Sky (or Icy Sky?)』
Narration of the trailer says:
the battle between the Gods is not over yet (the scene of Dialga & Palkia battling), new God-like Pokemon now wake(s) up (the scene of Giratina debuting).