A few weeks ago, LEGO's HP contract expired. Originally, they had signed a contract giving them the option to create and sell sets based of the first five HP films.
But, many months after the fifth film was released, They were given the chance to pay money to have the chance to release more HP building sets by signing a new contract,but they refused. Because of their actions, no more sets based of the films will be released for this new movie, or the last two films following. This seems an odd choice, because recently, LEGO announced that they were underway with producing a video game based off the HP books and films, and debuted a trailer for the game.
The expired contract already came into effect. No HBP sets will be in stores this summer.