People keep saying that HP died just because we haven't had news for a long while. But, frankly, except when Lego suffers an information leak, we don't usually get informed about new sets till around 6 months before their release. I still expect a new wave for next summer.
Here are my ideas:
- A new Diagon Alley shop, with a price of $40 or so. Most expect a WWW shop but, since the Weasley twins have already been released, I think it'd be more likely to be Flourish and Blotts or a double shop.
- A new addon for Hogwarts Castle, with a price of $65 or so. Perhaps with a small version of The Chamber of Secrets and the lavatory, or a more accurate DADA classroom.
- The Ministry of Magic, with a big price and a big number of minifigs, such as Umbridge and Fudge. It could be some fireplaces along with the fountain, a section of the offices and some Department of Mysteries room. Tonks and Kingsley could also be added.