I don't think Dragon Quest games typically have large first week multipliers. I'd say there's about a 80% chance the game stops between 600-900K. 1M would be very impressive.
America might be able to tack on 100K.
Within a couple weeks, it will be the #3 Wii game in Japan though, and the #1 full price game. That's a big breakthrough for third parties on Wii in Japan.
"[Our former customers] are unable to find software which they WANT to play."
"The way to solve this problem lies in how to communicate what kind of games [they CAN play]."
Satoru Iwata, Nintendo President. Only slightly paraphrased.







