Just because he clashed with him doesn't mean he gonna be his opponent. He clashed with Page One too.
The moment Queen mentioned Germa his fight with Sanji was pretty much confirmed. This is how Oda tends to build up his fights. He leaves that interesting detail that connects the two characters.
Have you noticed that Queen's neck is similar to the device Yonji wears on his right forearm. Same design and both act as a winch that can be extended. I know what Oda is trying to establish here. Sanji's fight gonna seem as if he is fighting his three brothers because I expect Queen to have all their techs in him. And by defeating Queen it would be as if he defeated his brothers. King vs Sanji ain't happening man.