List of New Super Mario Bros. 2 pre-release and unused content
From the Super Mario Wiki, the Mario encyclopedia
This is a list of pre-release and unused content for the game New Super Mario Bros. 2.
Platform Panic Pack was named the seventh Coin Rush DLC pack instead of the eighth. This implies that the Coin Challenge Pack C was intended to be released as number six, and that the Gold Classics Pack was not originally supposed to exist.