Yeah, I read that. I didn't place it in my list because they have yet to be proven; much less seen and given a numerical designation until confirmation and naming. According to this new theory, the two hypothetical planets could also not only be that far out, but their orbits might be perpendicular to the "regular" orbital plane. If that theory is correct, it would explain much on why they haven't been discovered already. Exciting stuff in astronomy and astrophysics!