The Emperor of Man appears out of warp space with His legions, to recover John Shepard, the last of the missing primarchs, so he may take his rightful place at his Father's side, leading his chapter of the Adeptus Astartes which Shepard dubs the Cerberus Marines.
Paragon Shepard joins his father in declaring Exterminatus against the Reapers and other lesser, vile aliens of the Milky Way galaxy. Horus, Leman Russ and Sanguiness join as Squad Mates. Alicia Dominica as a LI
Renegade Shepard accepts Slaanesh's offer to become a demon prince, and his champion. Slaanesh grants Shepard the power to bend the reapers to his will, and the entire Asari race as his concubines. Uses relays to open a new Eye of Terror. As his reaper fleet spreads Chaos throughout the milky way, Shepard resides on his throne on earth, committing unspeakable acts with asari and hanar, while drinking quarian tears from Tali's helmet.