The news contained in the title seems pretty likely as GameStop, famous American chain of game-shops, "has forecast" that Blue Dragon will hit the American market on the next 5th of June.
In fact, the new and first Mistwalker game, already available in Japan (since the beginning of December), has been inserted in the catalogue near the said date, which is also very near to the one of Bioshock, another exclusive and eagerly awaited title for the Xbox 360.
As usual, Microsoft has not commented the rumour saying that currently the game has no decided date.
It seems we'll have to wait...