Romance Dawn = Jormungandr confirmed for Loki
Shanks fought Loki to obtain Elbaf and Yonko status after he went back to sea from Dawn Island after saving Luffy.
The sea serpent bit his arm off, and then he conquered it, making room for Luffy to continue to grow and providing a mark to test his strength against Shanks. Then Luffy came along and beat it down himself. Foreshadowed world serpent Loki from the beginning. Same exact time frame also. Shanks headed out 6 years before Luffy did, and now Shanks beat Loki 6 years before Luffy arrived.
Shanks fought Loki to obtain Elbaf and Yonko status after he went back to sea from Dawn Island after saving Luffy.
The sea serpent bit his arm off, and then he conquered it, making room for Luffy to continue to grow and providing a mark to test his strength against Shanks. Then Luffy came along and beat it down himself. Foreshadowed world serpent Loki from the beginning. Same exact time frame also. Shanks headed out 6 years before Luffy did, and now Shanks beat Loki 6 years before Luffy arrived.