While I'm sure most people wanted the opportunity to buy that rather nice limited edition console released in Japan back in March, the US special edition of Kingdom Hearts: Dream Drop Distance could be much worse. Better yet, the price is rather fair, apparently set at $54.99 and is available to order now from Amazon.
The Mark of Mastery set includes a copy of the game, 5 AR Cards with which to unlock a variety of items (including "rare Dream Eaters"), 12 art cards from throughout the series' history (probably mainly box art) and a Kingdom Hearts branded case. Not too shabby considering that you're only paying an extra $15, especially when you think how expensive decent cases can be.
I've not seen any mention of an EU release anywhere, but I think it's fair to think we'll get something similar to this, although probably at a much, much higher price.