I think almost certainly yes because Nami foreshadows earlier how she has to use “stronger lightning” to beat Ulti, so once she gets Zeus back, she’ll show off her power with him by beating Ulti. Usopp also hasn’t gotten his moment yet in this arc, so I think he has to beat P1. His previous encounter with P1 showed him that his attacks need to hit harder, so I think he’ll win by unlocking CoA