I’m not sure about that. I think that the final panels would be something like all the Straw Hats enjoying their dreams being reality, and then Luffy going on some other adventure befitting his Pirate King status because unlimited freedom.
I think his real dream is something like “everyone is free as he is thanks to being pirate king”, or what he said against Kaido where “everyone can eat as much as they want”,
Or something like the “I’d like to buy the world a Coke” jingle, or the sake toast he did with Ace and Sabo when he was a kid. Just something really simple, yet could be seen as this grand thing to everyone except Luffy. And that’s what One Piece ends on (assuming it doesn’t end with the treasure being found).