
On September 5th, Square Enix will reveal the next Dragon Quest game, the publisher has announced. The announcement will be streamed live through Square’s Ustream channel from 2:00 PM onward (Japan time).
Note that there’s no mention specifically of Dragon Quest X, in development for the Nintendo Wii. While it’s been quite some time since the game was announced, no details, screenshots or in-game footage have been shared thus far.
A trailer for Dragon Quest X will be included with the Dragon Quest Anniversary Collection, which is due out on September 15th.
Source: http://www.siliconera.com/2011/09/02/square-enix-to-reveal-next-dragon-quest-game-next-week/
It better be Dragon Quest X. Either way, September 15th 
If it's another Rocket Slime I'd rage
Monsters: Joker 2 is just coming out in America and its updated remake just recently came out in Japan.