My version of Future Luffy power-up
1. G5: CoC fusion with rubber (homage to Dragon Ball)
Effect:
- CoC kamehameha
- CoC thousand Ursus Shocks
- Luffy's ultimate CoC attack to defeat Kaidou:
Luffy's unique CoC version of Broly's Omega Blaster
2. DF Awakening
Effect
- making the air rubbery (free self-bouncing and self-ricocheting effect in the air / unlimited geppou, enemies' attacks being reflected at will by the air bouncing before touching him)
- making his own physical / kinetic energy rubbery (change his haki pool and concentrate it into the type of haki he want while sacrificing the others momentarily, concentrate the attack in one smallest extremely destructive point or disperse it into AoE attack, absorbing the physical force of enemies' attacks into his own and use it as his own)
3. Will of D / Voice of All Things
Break the limit of all his ability, making his attacks being potentially able to surpass the limit of physics
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Luffy's creativity in unifying all three of these will make him able to do things on par with Marvel/DC things like far surpassing the speed of light like Barry Allen's Flash and Superman's Infinite Mass Punch, but my imagination is getting too wild lol