Poster on 2ch claims: (RUMOR)

• Brock and Giovanni appear in CoroCoro
• Cheren is a gym leader
• Kami trio formes are available through the AR Searcher 3DS app
• Movie area is called Pokéwood (A play on ‘Hollywood’)

This part is also not confirmed, and is from a different source:

• Blue, Lance, Misty, Steven, Volkner will appear  in the game.
• Brock and Giovanni are supposed to appear in some sort of battle facility “Like Cynthia.” The poster has now elaborated that there is a World Tournament facility that allows you to fight gym leaders from all over the world (seriously though, take this with a pinch of salt until further scans come up, we could just have a troll on our hands).

<3 pokejungle

ps- Who knows when the next scans will leak do keep checking back!