If this "." YonkouProductions post it's true, then I think it might be related to:
1- Sanji vs Queen finished.
2- Zoro vs King finished.
3- Both, Sanji and Zoro fights end this chapter with double spreads and so.
4- Act III ending finally, with point 3 included maybe.
"." Is also reference to end also something more than a fight so it can be the act III ending tho.
We will see, but at least option 2 is too predictable for anyone, because if Queen gets up, he will be for sure done this chapter.