Question: “Odacchi! We saw Monkey D. Luffy and Portgas D. Ace at intervals 40 and 60, so please draw Sabo at ages 40 and 60.”
Oda: “Well, here I drew it, but I honestly wouldn’t be able to say if this is how he’ll end up in the future.”
As you can see, Oda drew grown up Sabo at four periods of adulthood.
First where he had a nice ending. At 40, Sabo is with his extended hair and his growing moustache. At 60, Sabo holds his hair combed back, and we can see his huge scar decorating his face. This wound was caused when Saint Jalmack miserly blew up the fishing craft Sabo used to set out to sea, dropping him with severe burns and significant injuries.
Oda also thinks a fate where conditions go badly for Sabo. At 40, He looks like the rogue. He is seen twisting his moustache. At 60, he seems weak with his dirty hair and clothes.