Sanji v King is happening. Marco is stalling both King and Queen. Right now Chopper and the pirates he has cured along with Drake will take on Queen. That leaves King wide open for Sanji. Marco will more than likely have to deal with Perospero.
As for the "Sanji not ready for 2nd commander" argument, it is really weak when the rest of the SHs are taking on the Tobi Roppo and the Roppo are perceived more powerful than the crew not within the M3.
As for the "Sanji not ready for 2nd commander" argument, it is really weak when the rest of the SHs are taking on the Tobi Roppo and the Roppo are perceived more powerful than the crew not within the M3.