Board Thread:News and Announcements/@comment-74.243.11.72-20140422175611/@comment-74.243.11.72-20140422224657

Gsimenas wrote: Ask the developers that. Apparently, the game allows you to import IM content, since HF is basically IM + Hollow Area. I think it's just a way to make more money out of what they've already made.

It is more along the lines of releasing an enhanced port on a newer system that has more support, in this case, from PSP to PS Vita. It also improved chances of localization. The anime did exceptionally well in North America, besides the vocal minority of trolls (even gained over a million fans on Facebook in less than a year), so they could make even more money by localizing in North America, at least. If they just added on as DLC, there would be a 0% chance of localization, due to the PSP's condition in the West.