So after consideration, this fight can go many ways.

1. The ship can be totalled, but Garnet still has the passage to Treno and Pinnical Rocks. (Branching Paths.)

2. Can still do the forest and branch into different Quest. (Mostly Normal Route.)

3. Vampire Sub Quest in Treno. (New Content.)

4. Proceed with city work of Treno. (New Content.)