i still see maras, nocturnals, and langour dropping in addition to the 3 new sets
rallying was i think part of the "previous" set of 3 before the maras/nocturnal/langour set
new sets are always added in groups of 3, and only 2 sets of 3 are active in the rewards of the worthy at a time, the older ones get moved to boxes you buy from the war researcher in your alliance base