
The most popular theory is that the baby makino is seen with multiple times post timeskip is hers and shanks’s kid. Tho while that’d be cool and fine but what if it ends up being ace’s
Him leaving his son in the protection of Garp ironically similarly to what his biological father did with him

Ace and Garp wanting his son to be raised in the same country they were. Ace probably wanting the responsibility to go to makino instead. Just because she’s definitely a better model for a parent and to not stress dadan as much

As for the mother
No offense to her but she probably doesn’t really matter as much to the story itself so it could be anyone. They could sadly even be dead but I think the marine from the ace novel could be cool
Luffy finally eventually returning home realizing he’s an uncle would be dope as hell. Him giving the kid his strawhat would also be dope as hell