So, a couple of you may have remembered me mentioning a rumor that started with Dragon Quest music composer Koichi Sugiyama stating a new Dragon Quest Monsters game may be in development many months ago. Well, it seems that rumor was indeed true. A couple days ago, on the official site for Dragon Quest Monsters: Joker, it was announced they are making a sequel to the game.
Not too much is known yet, just rumors and small facts. So far it seems that the game will have direct player battles over WiFi and is rumored to have 300+ monsters (90+ monsters over that of the original Dragon Quest Monsters: Joker). Also, judging from the scans, the game is going to take place in a much more varried landscape than the limited 7 islands found in the original Joker. And the games hero has either been altered in apperance or it is a new hero, as you can see in the scan below.
http://www.nintendoeverything.com/31725/