I think that Luffy will eventually defeat Kizaru but he won’t knock him out completely just beat him in combat, after which Kizaru will have a change of heart and will want to not kill Vegapunk.
Saturn will transform and would want to kill everyone so as to not let anyone know of his powers and will backstab Kizaru who’s weakened from fighting Luffy, both Luffy and Kizaru will fight him off and Luffy will run out of gear 5. At the end Vegapunk will stay behind to self destruct the lab while Kizaru holds Saturn so he can’t escape and all 3 will die saving the straw hats and the marines
Lilith will be the only Vegapunk to survive
Saturn will transform and would want to kill everyone so as to not let anyone know of his powers and will backstab Kizaru who’s weakened from fighting Luffy, both Luffy and Kizaru will fight him off and Luffy will run out of gear 5. At the end Vegapunk will stay behind to self destruct the lab while Kizaru holds Saturn so he can’t escape and all 3 will die saving the straw hats and the marines
Lilith will be the only Vegapunk to survive