A lot of us here think Act 3 will contain the entire Onogashima portion battle at least. There are grounds to believe, that like in a Kabuki play, Act 3 is the turning point where a tragedy happens.
Said tragedy hasnt happened.
Really? This entire arc has been a freaking tragedy, imo. Seeing Wano go from this beautiful, lush, paradise to the horrible wasteland, getting to know Oden and see how happy the Kozuki family was, then Oden's horrible, horrible death, Denjiro's heartwrenching reaction, and now this shit with Kanjuro?
Says tragedy to me.
Maybe the Scabbards will get captured or something and feel that all hope is lost, but then Luffy and the others arrive in the next chapter, starting Act 4 and the final battle.