From Serebii Forums:
It'll be nice to finally see Rotom and presumably all of its forms. Though I wonder where this will be taking place.Saw a post on Pokeani mentioning a title called:
Which translates to "Yokan and Rotom"
Mori Yokan, is the Japanese name of the Old Gateau, the item you get in the Old Chateau. It's a type of jelly.
I don't see an airdate, but it seems to be from Pokefan Magazine which should officialy be coming out soon in Japan like tommorow.