Yeah why not can be a cool restaurant idea
And what will be the role of his bros and sis ?
working with Sanji and Pudding ?i don’t really see them that way but why not
I don't like the idea nor do I believe Sanji will never reconnect with his family again, especially his sister. Their father is a piece of shit and the only redemption for him can be found in death, but his brothers are different. They didn't get a choice in becoming what they became, they were, in fact, the unlucky ones their mother couldn't
save. It feels antithetical to One Piece for that to remain unchanged.
imo, the way this ends best is with Sanji's actions at WCI, which were, in many ways, the product of their mother's love for all of them, to have changed something in them.
If not a late activation of counteractive drugs Sora took, then the sheer capacity for kindness Sanji demonstrated in coming to save them in spite all the cruelties and humiliation they put him through.
I don't expect them to be a big part of his life if Sanji opens just a regular restaurant, but he were to dissolve the Germa Kingdom and go big, yeah, it'd be cool to see them all there. They're all still so young, with a lifetime ahead of them to heal, forgive and love each other as their mother would've wanted.