What Toki said is just to give hope to the Wano citizens, saying the 9 Scabbards would show up agains after 20 years to take revenge on Kaido. So the 9 shadows are the scabbards. The brilliance of Dawn is related to what needs to be done during the great war. And SN's were primary figures in the eyes of oden.
Oden doesn't say anything about 9 people. Toki does and the 9 shadows can be 9 scabbards because her prophecy did not say anything about 9 shadows taking down Kaido.
Oden doesn't say anything about 9 people. Toki does and the 9 shadows can be 9 scabbards because her prophecy did not say anything about 9 shadows taking down Kaido.