Sadly, I don't have more information about this than you, but I would at least like to say that this should be another good third-party success for Wii. Even though the support from the third-parties is winding down somewhat, it isn't totally disappearing, and DQX is proof of that.
That and there are also games coming out this year (have come out already) from 3rd parties which actually look interesting too. Oh, and Nintendo's new titles as well.
If you ask me, this is gonna be Wii's finest year; hopefully third parties will see some similar success on the system with some of these titles coming up.