What a main-quest order includes
Each order is one complete main quest run in one session: the setup rounds, the wonder-weapon build, every side step the quest depends on and the boss fight — Rex Infernus ends the Black Ops 7 storyline with the confrontation against the Warden — so the completion, the calling card and the quest rewards land on your account. Nothing has to be bought first: every Standard map is part of the base game and its free seasonal updates.