the racist side of Killingham just confirms he will be Sanji opponent, since Sanji caused him to breathe the same air as Fatbe, which will trigger him completely, and eventually Sanji will be his main target.
The only one left for Zoro is the.... washed Sommers
Unless DR Loki actually hapens and Imu disappears, so It will be like the whole island vs DR Loki, which would be crazy and unrealistic.
Unless Zoro fans want Luffy vs Imunko and Zoro vs DR Loki, which is even more unrealistic.

