All right. Time to leak something nice. It will be announced next week.

This is me finding the leak:

https://www.youtube.com/watch?v=2NHqAvBfw0Y

The Ships: Tier 4: Des Moines = Salem Witch (Salem is a ship of the Des Moines class)

Tier 5: Essex = Phantom Hornet (Hornet iirc was one of the Essex class)

I think they will be part of a special game mode.