I'm not sure if OML will even reach THP first week sales, but I hope I'm wrong. On the other hand, "Heavy" was more successful than anything on that album if I'm not mistaken, so I have no clue. It's also a more accessible album. People are very split on this album, but it's gotten a lot of attention and the band has spent a good amount of time marketing it. But either way, they'll still make most of their money through touring, should it be a commercial flop.