Mega Evolution II!
This special, due to air on November 6th in Japan, features Alain & Mairin as they go to Hoenn and meet up with the Hoenn Champion, Steven Stone, and encounter various Mega Evolutions. Alain is set to battle Steven with his Mega Charizard X vs Steven's Mega Metagross, but during the battle, a mysterious man appears. There's a dormant monolith in Hoenn where all the pieces are in place to reveal the secrets of Mega Evolution. Rayquaza is also said to make an appearance.