The second part of the special will give fans a look back at the Pokémon XY & Z anime thus far and provide a complete explanation of "all the mysteries" of the show, which includes: Zygarde's secret, Alain and Team Flare's goal, the strange phenomenon that happens to Ash and his Greninja. The second part also gives us a preview of what will happen to the future of the series, which includes Ash vs. Alain, Team Rocket vs. Team Flare, and Serena taking on the Pokémon Showcase.
[Source: Anime News Network]