Jean Bart B, Cossack B, Kaga B, and Atlanta B are already available in the Premium Shop and Armory. You can purchase all four ships as a single set with a 35% discount! Apart from new black ships, your collection can be expanded with battle-hardened veterans: Alaska B, Graf Zeppelin B, Scharnhorst B, Sims B, Massachusetts B, Tirpitz B, Atago B, and Asashio B. You can purchase them in the Armory.
Keep an eye out on the official World of Warships website. Your first port of call for new ship releases!
If you're a console player, check out WoWs: Legends https://wo.ws/WoWSLegends
The Chieftain (Real name Nicholas Moran) is Wargaming America's resident tanker and amateur historian.