Having missed out on the EB Games sale (out of stock now), I found this one cheaper at a cheaper price.
http://www.mightyape.com.au/product/Nintendo-Wii-U/Batman-Ar…
The EB games one was $48.
Also, if you are after Super Mario Bros Wii U, you can get both for $106.77 + $4.90 shipping. (Shows on the bottom of Batman page)
Not sure if that's helpful for everyone but Mario is usually around $69.
Maybe sell Batman if you don't like the game for $48 and you get Mario for less than $60.
Found Mario for $60 @ http://www.ozgameshop.com/wii-u-games/new-super-mario-bros-b…
Great find DM. Picked up Batman (even cheaper than EB yesterday) and Lego Lord of the Rings PS3 (cheapest I've found in OZ)