According to wii.qj.net there is a new pokemon game in the works.
Via Tokyo-TV & Nintendo Everything
Pokemon Sunday cast
Looks like Square Enix isn't the only one gearing up for a surprise announcement this week. Rumor has it that a new Pokemon title will be revealed come Sunday.
The rumor comes in the heels of the announcement tha the upcoming CoroCoro issue will be featuring the next round of Pokemon titles. This time, though, the "shock announcement" will be happening on next week's Pokemon Sunday episode.