I agree with NASA that the planet does not exist.
If a planet as large as Nibiru is supposed to be was in a rogue orbit through our solar system or universe, it's gravity would seriously effect other celestial objects in it's path. We would be seeing the evidence of that right now. Instead, we do not see any evidence today. If it was one year out from us, it's effect would already be clearly seen.
You would not need a telescope to see the gravitational influence such a planet would have. It would be visible to the naked eye now, and it's not.
This is all a hoax propagated by people who would like to make a profit.