There was a report on NPR this morning, about a new small object that they recently found a small object waaaaaaaaay out there. It is about 200 miles in diameter, and it has an asymmetrical and out of the plane, too. It's orbit takes about 40,000 of our years.
The other thing they mentioned, was that the best explanation for the irregular orbit of this new object (and many others out there) is that we may have a VERY LARGE planet even farther out.
The first thing I think of is, that maybe that large planet is that it may become a rogue planet?
https://www.npr.org/2018/10/02/65345...g-implications