The official website for New Super Mario Bros. U has been updated with some new content. Along with the new artwork seen above, there are some info summaries as well. Nothing new info-wise if you've been following along, but still nice to see the content added. The site also clears up the snafu about 1080p that was originally posted.

The previously stated information about video output for this game was inaccurate. The Wii U console supports video output of up to 1080p. While all Wii U software titles display high definition graphics, resolution for specific titles may vary.
Site here
Link