Yeah, pretty much confirmed for me, that zoro will get his time hiyori and orochi + his background will be revealed here.
Ps. I believe hiyori is in onigashima, there was in the last chapter a woman, who played the same instrument as hiyori. So I believe she infiltrated onigashima to kill orochi herself.
She purposedly didn't say anything to the others, so that they wouldn't stop her. But things will get fucked up, so zoro will come to the rescue.
My theory on this.