I also like to entertain the idea that Sanji started a process of "reconciliation" with his family. The event that triggered it was when his siblings appeared to help him escape with Luffy. They had already "paid him back" for saving them during the wedding ceremony, when they tried to buy them time to escape.
It could be that they just wanted to fuck the BMP up, but the siblings act during the rescue scene, precisely to make Sanji's escape possible. They attack the enemies that are targetting Sanji, instead of just attacking whoever is there, they launch him forward, they shield him, etc. I've said it before, but I REALLY would like a reconciliation for Sanji and his siblings. Ichiji, Niji and Yonji are, despite being dicks, heartless beings, programmed to be so. It's not a matter of "they were raised and turned out to be dicks". They had 0 choice on this matter. Judge can go suck a dick, but the kids should be able to be free from his control. After all, they are all Sora's children.
The same way, maybe reconciling with his siblings brought Sanji closer to them, by unlocking his modifications, it could be REALLY interesting and quite touching, if the reverse was also true. By reconciling with Sanji, it could have "triggered" the drug Sora took and manage to unlock the siblings emotions as it did for Sanji.
There's A LOT of potential for this plotline, but if it ends up being something built entirely for Sanji alone, I won't complain. :P