J.K. Rowling has a planned announcement for June 22nd. It looks to be about the new Pottermore, since the design for the countdown to her announcement is the same as the Pottermore website. Check it out here.

A friend of mine thinks it's a fansite for Harry Potter fans. I've heard ideas such as a new publishing house or a prequel to the series! I'm hoping it's a West Coast version of The Wizarding World of Harry Potter. XD Though, I know that's highly improbable.
So, what are YOUR thoughts on what Pottermore could be?