This game is confirmed for release in the West. Here's NIS America's website: http://nisamerica.com/games/rodea-the-sky-soldier/. Curiously NIS America shows the platform as Wii / Wii U / 3DS so we might see the original Wii game in the West, too!
EDIT: Too bad it seems there's no multiplayer aspect to the game, so it's just a vanilla single player experience. :/
EDIT: Too bad it seems there's no multiplayer aspect to the game, so it's just a vanilla single player experience. :/