http://www.nintendo.com/games/detail/pIE2OZ9JugoKlTD15QpcsmXuktcEqPK6
The Gameboy Advance version of the classic Super Mario Bros 3 is coming to the Wii U VC in NA today. This will include all of the E reader levels not previously released in NA. So for many of us, we will play brand new Mario content for the first time.
See a video below of the various exclusive features from the E reader levels: