Mario Kart 8 sales are off to a promising start, despite the notable fact that the game is not due for release until May 30.

It seems that are no longer taking pre-orders for the 8th outing to feature our favourite plumber and his crew behind the wheels. When you go to view the game, you will be greeted by a message that reads ‘Sign up to be notified when this item becomes available.’

Maybe not surprising, as this game is expected by everyone, including Nintendo, to be one of the games that could finally boost sales of the Wii U. Whether the Amazon notice means the volume of pre-orders has been overwhelming, or if it’s simply a stock issue, is not clear.

Have you pre-ordered the game yet? Let us know in the comments section below.

Refresh yourself on what to expect when Mario Kart power slides onto your Wii U, with the trailer below.