User blog comment:12th Supernova/Chapter 813 thoughts and blather/@comment-24850639-20160127194458

I'm not comfortable calling it yet that there isn't going to be some sort of effort to go after Sanji. Luffy has only shown 2 reactions to the Sanji news so far:

The 1st time he finds out about him being gone and the note, him and Zoro are rather casual about it, confident that he can figure it out.

The 2nd time however, is as they're leaving Inu-Arashi's. Zoro mentions that Caesar and Sanji havent went missing from the story yet, and before we go into the 2nd flashback, Brook implies that he may actually be incapable of returning. Luffy is visually upset at this, saying "but he promised!"

We have yet to actually see Luffy's reaction to all this, now that we've learned the Yonkou HE picked a fight with is trying to marry one of his nakama into her crew, and thus make them subordinates. The instant he said that, this no longer became just HIS problem, and I believe Luffy will feel similar. Nami trying to leave didn't fly, Robin trying to leave didn't fly, and I dont view this any differently. If Luffy isn't ready to handle a Yonko yet, theres NO WAY that Sanji is, so I him getting in over his head at some point, and the Straw Hats showing up at just the right time. Going off of that, yes, I do care and believe that Pekoms is alive. I think he got left behind on Zou, and he's going to be the one to tell the Straw Hat Crew about Big Mom's background and just what's going on. Probably what Caesar was supposed to be researching too.

I'm fully prepared to be wrong though, and am totally ok with Sanji getting into some rogue, secret-agent mission type stuff and handling this all COMPLETELY on his own. He kinda deserves it. It would just be a rather drastic change for the series, seeing how they've grown into this dynamic of "my bs is your bs", "real friends will always have your back", etc. etc.