Nintendo Australia have confirmed that we will receive the Splatoon Wii U Premium Pack on May 30th in limited quantities. The bundle includes a Wii U premium console and a copy of Splatoon (game-disc). It will retail for $359.95. It appears that it will be available at all retailers.
Launching on the same day are the Splatoon themed Amiibos. Inkling Girl & Inkling Boy will be available for $17.85 each. Inkling Squid Amiibo is exclusive to the Amiibo Splatoon Triple Pack which includes all mentioned figures for $49.95. Using Amiibos in game unlock challenge stages that will allow you to earn gear not found anywhere else in the game.