Amazon has recently listed a new LEGO Brickmaster Atlantis Book. Available August 16 / 2010 for $29.99 USD. Predictions may either be a lego set with multiple instructions similar to other brickmaster books, a visual dictionary or LEGO Atlantis Storyline.
Also, if you visit our forums regularly, this would of have been old news. The LEGO Atlantis 20013 Brickmaster set is scheduled to be available in the next issue of Brickmaster Magazine (Jan-Feb).
*Our forums has news posted in advance there and features additional LEGO sales. Registration is free and fast.