It is my understanding that one of the questions they want answered is whether these asteroids are rubble left over the the solar system’s creation or pieces of a planet, as their orbit is where a planet should be (Bode’s law). The problem is there isn’t enough debris to make up a plant.
I thought Sitchin might have had the answer with his “moon of Niburu colliding with earth and tearing out a chunk, where the Pacific Ocean is now.”
IMO, if the samples turn out to be residue of a planet, it’s back to the drawing board.
Maybe that's the answer. There just wasn't enough material for planet formation..........................