[Kotaku]In Japan, Vita has more upcoming games than any other console.

[Samus Aran]

Kresnik said:

Samus Aran said:

Puzzle and Dragons: SME is coming to the West.

Okay.  What does that have to do with what I just said?

Well it refutes one of your examples.

Without good sales in Japan localization is unlikely. But yeah, it's not the only factor of course.