The "Akaneki" version of Centipede at some point.
Hinami rescued. Either by Aogiri/Ayato mirroring how he's now "Rabbit" and Mado realizing Rabbit is tied to Hinami, or by Anteiku in a role reversal of sorts.
Related to that, more Kirishima family details in general since this section of the story was a bit Kirishima heavy, at least in the behind the scenes/subtle way.
More details about "Floppy" who looks to be at least one of the Yashisa sisters, and potentially with Floppy Amon.
We might start getting hints regarding Hide since we are lead to believe Kaneki now should have all his memories and this is when Hide began becoming a Dove timeline wise.
Anteiku will be involved with the major arc fight, but it might be another "Oh, here are signs they were in the background with Aogiri and the Doves too distracted with each other to notice" type deal since we are no longer following them directly.
A Kamishiro may return. Though admittedly I half expect Ishida to pull some sort of "clever" trick regarding kami-shiro and na-shiro (who may be dead. last seen wounded). So it may not be Rize or Orca.