It’s true! A planet is going to make a fly by. According to Kottke, the minor planet 2014 UN271 is about to visit our solar system. By 2031 it should be about as close to the sun as Saturn is!
I hope we can get some good views of it while it is in the area.
For more on it, see the Kottke article. He also has links to more pieces on it.