Update: Nintendo disabled pre-loading for Paper Mario on the Nintendo E-Shop, so you cannot get access to the game any longer. If you started downloading the game/downloaded it already, it shouldn’t be taken away from you or anything. More on this as the story develops. Thank you KingBroly (NeoGaf User) for pointing this out.
Apparently, if you pre-load the digital copy of Paper Mario: Color Splash, you can play the game right now in North America. Very likely glitch in Nintendo’s E-Shop systems and will be fixed soon. If you want to play the game now and have a large enough hard-drive/extra space on your Wii U hard-drive, then I recommend you pre-load the game now in North America.