It's only sold 60k in Japan, no way that's enough to recoup the production costs of a HD game. 

Wanting to break even or a least minimise losses should be motive enough to release it worldwide. 

Then again, if they don't, it will be hacked like Fatal Frame 4, so it's really just a matter of how long we'll have to wait. Either way, we're getting it.

I feel like you're underestimating the capabilities of Japanese devs like this.  Plenty of the otaku-teams who work PlayStation only could profit with a HD game on those kinds of sales.

Then again, plenty of them get more money out of it from recycling a lot of assets across multiple titles, and I don't think that's the case here.

Also, this game seems to have had a bit more polish than some of those I'm talking about.

Still, Deception IV sold similarly across PS3 & Vita, and I don't doubt that would've been profitable on Japanese sales alone.  

It will be released at a time when the WiiU has a big drought and Nintendo has nothing important to release, so I assume it would be a year after the release of Zelda U. That way, it will profit from a (slightly) bigger userbase and more attention to the game.

It's not what I expect, but if it's the only way to get the game translated. I'm fine.