According to leaker Liam Robertson, there are several sources that suggest that New Super Mario Bros. U come to the Nintendo Switch this year.
Liam reveals this in an article on Comicbook. These are sources that are close to Nintendo of Europe, which previously provided accurate information about Mario + Rabbids: Kingdom Battle.
New Super Mario Bros U Deluxe
The sources strongly suggest that the port will be called New Super Mario Bros. U Deluxe. However, it is unclear whether this is just the name of the project itself, or the final title. However, the name would not be unlikely, given this is a homage to the time-honored Super Mario Bros. Deluxe for the Game Boy Color.
This was a port of the original Super Mario Bros., but with countless extras like The Lost Levels.New Super Mario Bros.U originally appeared at the end of 2012, at the launch of the Wii U.
The connections at Nintendo of Europe at least almost all mention that it is a version that New Super Luigi U would be added to, a stand-alone add-on that dates back to 2013 and was full of fast and extremely difficult levels.
Extra new content?
Some sources even say that new content will be added, but the lips are still tightly held together. We doubt that a little bit as that would break with how most Wii U-ports come to the Nintendo Switch.