Nothing actually implies Zoro vs King is next chapter. Oda has had skirmishes with characters done before. Sanji vs Queen will happen before the end of this fight lol, it's standard for this series.
I would not be surprised that these 2 fights last longer than we think (i.e., like the Yonko) and we just keep getting scenes like this sprinkled throughout the next 7-8 chapters, THEN the remainder of their fights happen. Queen first, King second. We all know how this goes.