I legit think oda is holding luffy and zoro back for a few possible reasons ...maybe we get a kizaru coc display.
Zoro vs king showed us in the end that king was scared of what zoro could do so he backpedals and turns off flames and attacks zoro.
Gb vs King was off screened but he was caught and had his flame off,no reason in turning his flame off vs gb unless just like zoro he was afraid of what gb could do and got scared.
So maybe we regain control over the seraphim and then incoming kizaru flex adv coc
or option two its just luffy and zoro flex lol