In this AU, Luffy destroyed the world after everything (more like destroyed all kingdoms and big places like the building of the World Government to revive Ace) so may I suggest whatever you do, you play as Luffy, but you don't have to. You may delete this!
After he had died, everything went dark. He had known he died; he remembered it all, but death was like a nap; a quick moment of darkness, just void. He couldn't feel nor remember the events of what happened when he was dead, if he went anywhere, if he saw anyone, or if there was anything all. If so, then it was like a dream, where you just forgot it when you woke up. And he did. In a grassy field with a clear blue sky looming over him. He felt everything again, happiness to be alive, sadness remembering everything that happened at Marineford, everything. He stood up with a small grunt, his beads lifting and hitting back onto his chest softly as he places his hat back onto his head of messy hair that was being pushed to the right of his face due to the windy air. He stood up, walking through the small field, walking to a thick forest in an attempt to figure out where he was, although the trees blocked most of his view (although stopped some of the wind from hitting his face.) He would've gone another way, but he couldn't see anything besides forest surrounding him, so it was his best bet. He flared his flames on his right hand, holding them in front of himself, giving him a better sight.