Back in November, publisher Warner Bros. Interactive Entertainment and developer TT Games announced that LEGO Worlds was set to launch on PS4, Xbox One, and PC in North America on February, 21, 2017, and on February 24th in Europe. Today, TT Games Head of Design Arthur Parsons confirmed, via Twitter,  that the game is also coming to the Switch.As mentioned above, the news comes via Twitter, specifically Parsons' interaction with a curious fan:

As of right now, we know no further details beyond the game's existence on the platform. Obviously, the game launches before the Switch even launches (on March 3rd), so it won't be coming to the Switch until after it releases on every other platform. Further, if it was a launch game, I'm sure it would have been announced already. All of that being said, it will likely land sometime in 2017.