I'm loving my PlayStation Vita so far, and I don't know why game developers are jumping ship...Many consoles had a slow start at the beginning like the PS3 but now it's selling. Just give it some time, and it'll get the momentum started!
Nevertheless, I'm still getting a PS Vita. My PS3 had backward compatability with PS2 games before, but it stopped working, so I just play PS3 games on my PS3 now. My PS2 can just be used to play PS2 games. If I want to play PSP games, I would just buy them on the PlayStation Store then! That's still okay. :P
If North America is to get this game, it'll likely be in 2013 since this game is going to be released this year in Japan. All we can do is to keep on wishing!! Hopefully it'll sell well enough in Japan that would convince them to bring it here!