Speaking of Shirahoshi.
Oda set up two potential goals or dreams Loki could pursue outside of the vague end the world script he's been dealing up to now since he was essentially playing a role.
1) He figures out speaking to "Mosa" through den den with Jinbe present that shes Princess Shirahoshi and he decides he wants to meet his friend by traveling with the crew who have also promised to show her the Sun. (Loki claims to be Sun God at one point)
2) He decides to finish what Rocks started by seeking out Galleila which would also directly correlate to his "destroying the world" gimmick since Rocks told him they had the power to bring even the WG to its knees, if he had Harald in his crew with the legendary fruit which Loki now has. The crew may or may not have realized Punk Hazard is their resting place. Or maybe Jarul knows, since he confirms all but where they're being held.
Both destinations are prior locations the crew have visited, but we know from Twin Cape with Brook and Laboon that isn't an issue narratively.