Oh that is true, I mean I personally have nothing against 2v1s or 1v1sI have a feeling Killer will get something more than that but I wouldn't mind. I just want solo fights for everyone to go all out and prove that the Straw Hat crew IS worthy of being a yonko crew in the future.
2v1s can also be cool, just imagine Brook having a better portrayal than Killer, this would already give me nerdgasms of doom XD
But you are right, Brook also deserves to jump on atleast Supernova club level more or less like every Strawhat later on, and some of the Supernovas will move forward. Tho I think Apoo won't be relevant after Wano anymore, so it makes sense for characters stepping up to outclass him.

