I think that Oda is writing a masterpiece in Egghead.
- Kuma and Bonney who have waited for Nika to appear are going to experience this for the first time in their lives.
- Luffy will defeat Saturn to free Kuma and Bonney, like Kuma promised to Bonney.
- Kuma will realize that he was right to put his faith on Luffy back in Sabaody. I can't wait to see Kuma and Bonney realize this, and Kizaru reacting to that.
- Saturn's defeat by Nika will bring the "light" to a lot of people and one of the first ones will be Kizaru, who may even side with Luffy during the fight.
- Thanks to Morgans, the news will say that Warrior of Liberation Nika is back and probably that Kizaru betrayed the World Government to side with him, the world will go nuts, this will shock everyone.
- The World will finally realize that there is "hope" out there, that there is light at the end of the tunnel, that they can go against the World Government. Not only mere citizens but mainly everyone: Shanks, Revolutionary Army...
- I think that this is what will trigger the Final War.
- All by revealing the secrets behind Devil Fruits (Nika) through Vegapunk and Saturn.
That's why I can't comprehend when people say that Nika is not defeating Saturn this arc. This goes beyond powerscaling and agendas.