New Resource: "Steel" will be obtained through "Ranked and Clan Battles" with a chance in Super Containers, can be used to buy: Flint, Black, Stalingrad
New Resource: "Coal" will be obtained through daily containers and some missions, can be used to buy ships that are usually paid for with Free XP (e.g. Musashi, Nelson etc)
SOURCE: KoTS stream with Philigula