He knows, but he's not telling

Game Freak director Junichi Masuda has brushed off a fan question about a sequel to Pokémon Black & White with a hint to watch out this Sunday.

Asked at a public Q&A for information on a follow-up to Black and White — likely the inevitable Pokémon Grey — Masuda said:

I can't answer that yet. Well, I can say to watch the next Pokémon Smash.

Pokémon Smash is a Sunday evening TV show in Japan that has often led with new information about the series, so it's possible we'd hear about a new game there first. Watch this space.

[source pokebeach.com]