Just want to point out that this is technically a dupe, but it's had a lot of replies so I'm not gonna lock it:

http://gamrconnect.vgchartz.com/thread.php?id=185039

And here's what I said in that thread:

"Pull a Ni no Kuni and make it 3DS/PS4. I've been saying that for a while.

It'll probably be Level-5 developing it anyway, so we know they can manage it."

I didn't think of that situation, but I'd certainly be pleased with it.

Also happens to be that handheld sales are much stronger cause thats where the games are in japan.

In the HD era, i think the japanese had too much of a problem going into ful HD development. So, they settled for making handheld versions of their games instead. cheaper..... that in turn made the gamers go to the handhelds. Hopefully this gen can turn that around, especially with mobile takig over the handheld space.....

One can only hope.

The PS4 is also still selling terribly. We shouldn't be comparing the terrible sales of the two because it only make the situation look even more sad. The best bet for SE is clearly the 3DS, as of now. Some of the DQ fanbase is definitely already on there (DQVII, DQ: Terry's Wonderland, Slime Mori Mori, that other re-make.) and it's already going to be the largest userbase of any 8th generation console in Japan, which is where DQ sells. 

However, I could easily see Nintendo not paying up for this exclusivity considering how completely stupid they are. As of now, it's completely up in the air. If you asked me where DQXI would go a couple weeks ago I would've definitely said 3DS, now I just am not sure.

WiiU or PS4 you say?

Hopefully it comes to Wii U, and hopefully it actually comes the fucking STATES, and hopefully it's an actual game, and not another MMO.

But honestly, if Square were wanting to make the most $$$$ possible, they'd make it a 3DS exclusive, as DQIX is the highest selling entry in the franchise, all time.

PS Vita! HAHAHAHHAHA

It is selling terribly in Japan, but doing well everywhere else. While the West isn't much a factor with DQ, the series has made strides in the last 2 iterations. If DQX hadn't been an MMO on the Wii, I'm sure it would have gotten localized and done well. That said, if Nintendo decides to amp up their offering to Square, it'll find its way to Wii U. 

3DS still makes most sense for their track record.

SE tends to keep Dragon Quest with Nintendo and Final Fantasy with Sony, but I'd be very please if they developed it for both (even though they won't  bring KH3 to the Wii U)