by It seems like there is some more ground to the New Super Mario Bros IU rumors from earlier this year.
Source
Do to the New Super Mario games being so popular with the casuals I can see Nintendo releasing this port in October or in early 2019. I also see them tossing in another character like Toadette, Peach or Daisy.
Comicvook.com wrote:New Super Mario Bros. U, the most recent installment in Nintendo’s 2D platformer series, could be making its way to Nintendo Switch if recent rumors are any indication. If the rumors are to bear fruit, it would join a growing catalogue of Wii U games to receive updated releases on the Switch, like Captain Toad’s Treasure Tracker and Mario Kart 8.
Initial rumblings about a possible port of the game date back to early this year before E3 2018. Sources connected to Nintendo of Europe, who have provided accurate information in the past on games like Mario + Rabbids: Kingdom Battle, began to suggest that a port of NSMBU was in the works. Throughout the year, we have been following up on these rumours with other tipsters linked with Nintendo who have corroborated these suggestions.
Multiple tips we have received for this article indicate that the supposed reissue of New Super Mario Bros. U will include the New Super Luigi U add-on. The paid DLC campaign was originally released in 2013 and enjoyed a standalone physical release around the world, too. Nintendo later started packaging the two together when the titles joined their Nintendo Selects range. Some sources suggest that the rumored Switch release will include new content of some description, although exact details on this appear to be tightly under wraps. It might be worth noting that when they last re-released the game on Wii U, Nintendo did add over 200 new bonus videos which showed skilled staff playthroughs of various levels in the game.
Source
Do to the New Super Mario games being so popular with the casuals I can see Nintendo releasing this port in October or in early 2019. I also see them tossing in another character like Toadette, Peach or Daisy.
