Hello. They announced 3 new games a couple of months ago that are part of the kingdom hearts saga. Here they are in order or importance.

The 1st is Kingdom hearts 3D.
This game was announced at e3 this year and will be announced for the 3ds. The game is right after kingdom hearts 1. It takes place in destiny island at first and features traverse town in the trailer. The plot hasn't been announced yet but will plan to be realeased on April 2011.

The next is Kingdom Hearts reconnect. This is the secret ending to Kingdom Hearts Birth by sleep (realeased january in Japan and October in America for the Psp). The main concept of the game is a mission that king mickey gives to Sora at the end of Kingdom Hearts 2. The mission hasn't been announced yet but i do know that involves reconnecting all the worlds again. This is to be realeased on Ps2 next year.

The last is the one that amazes me the most. Kingdom Hearts 3. In an interview on March 2010, Tetsuya Nomura (creator of Kh) announced they've started the plot line for Kingdom hearts 3. Nomura hopes that it will be announced sometime next year and realeased in 2012. I have no other info but will tell more later.

Thanks!
-Szabo