I too am frustrated by the lack of knowledge. I would say Pilotwings is probably a given for Western day 1, as is SS43D and Nintendogs/Cats (damn lack of plus sign. Is this ever getting fixed?). I think Tecmo-Koei was gunning for having DoA:D ready for Western Day 1, as well
Either way, i'll probably just pick up Pokemon Black/White and hang out with my 3DS in Japan for a while. Pilotwings or Dead or Alive if Pilotwings isn't there. Steel Diver could be worth a look too (it's like a modern-day NES game: take a random, simple concept and expand it into a game.), and Steel Diver will likely make a presence as well
But as for any straight confirmations, we're just gonna have to wait