I saw a while ago, in wikipedia, that the producers of kingdom hearts and kingdom hearts 2 are thinking about making a 3rd installment, but it will be the beggining of a whole new series, it wont simply be called "Kingdom Hearts 3" but a total different series. I also saw that they will release new info on the next installment this summer, but so far i havent seen any new info. They said that they are currently working on final fantasy projects, and then they will think about working on a new kingdom hearts game.