Wouldn't that be interesting?

Dark Jupiter May Haunt Edge of Solar System

A century of comet data suggests a dark, Jupiter-sized object is lurking at the solar system’s outer edge and hurling chunks of ice and dust toward Earth.

“We’ve accumulated 10 years more data, double the comets we viewed to test this hypothesis,” said planetary scientist John Matese of the University of Louisiana. “Only now should we be able to falsify or verify that you could have a Jupiter-mass object out there.”

It amazes me how much we're still learning about our own solar system. It's a complex and wondrous thing.