I wish it will be very brief. I was looking through the length of past arcs. Oda can in fact make short ones. Loguetown and Reverse Mountain were only 5 chapters each. Whisky Peak was 9 chapters. WP was the arc that came before Little Garden, where the Strawhats met giants of Elbaf. SH probably go to Elbaf after Sphinx. Do you think it is possible that Sphinx will only take less than 10 chapters?