My "bold" prediction on DQ11:
There will be a 3DS version. Maybe on the New 3DS. Perhaps this is one of the reasons Nintendo's releasing the new hardware.
If the DQ devs or Square want the game on a console too, or they just want a bigger splash, it will get a PS3 port. The PS3 port would be easier if they use the horsepower of the New 3DS, so it kind of links. And then if Square wants to get a bigger west audience or wants to start planting seeds for their FF/KH audience they'll make a PS4 port on top of that.
There's no way the game stays exclusive to anything other than the 3DS, and even then it will still get a HD port within a year and smartphones within three.