They wouldn't just have qualifiers in 47 prefectures across Japan and then hold the finals in San Diego without having at least one qualifier stateside too.
And if I remember correctly, the Pokemon Emerald showdown took place in April of 2005, about a month before the game was released to the general public. They could do something similar with Platinum.
With Emerald, they had an online competition leading up to the actual battling part. The finalists were sent the game and had to beat the Elite Four and trade their team to or create their team on Emerald.
I think that we'll have a similar timeline for 2009 as we had for 2008. The announcement in April, the drawing for participants in May, the competitions in July, and the finals in August. Remember, D/P came out in Sept 2006 and were here by June 2007. Almost of the translation and such are already done, I'd imagine that we could have Platinum by May, which would make it the game used for this tournament.






