Domri will be going, because everyone'll show some respect to a war hero, right? As someone from the Valkyrie tribes he's not going to care much about killing, not that he's likely to be able to kill anyone even if he tries. Not sure about the Pokéball thing though; he's not a fan but he's also not exceptionally useful in a fight without Pokémon as backup so the more he brings the better. Sadly this is Domri we're talking about here so if you're looking for subtlety...

Banzu will not be going, though he intends to get some Pokéballs for research purposes. He has item creation slots open though if anyone needs anything made, and oddly enough if they're going to Sanctuary he'll basically only be charging for materials, not that he'll say that he's temporarily lowering his prices.