I’m not lying.  Bungie released this statement confirming that there will be online co-op in Halo 3.  There will be up to 4, yes 4 players of the online co-op.  Amidst rumors of their inability to develop a two man campaign, they surprised us all with a 4 player juggernaut.  Now, the surprises do not end there.  They did not want to have 4 Master Chiefs running around so player 2 will still be the Arbiter and 3 and 4 will be as follows:

PLAYER 3 (Sangheili)

Name: N’tho ‘Sraom
Affiliation: Fleet of Retribution/Special Warfare Group/Special Operations
History: N’tho ‘Sraom is the youngest member of his Special Operations unit and is one of a growing number of human sympathizers amongst the Sangheili youth. He is a fairly typical young male adult Sangheili—he began compulsory military service at the end of adolescence, and remains unmarried with no close, non-familial relationships outside of his martial order. N’tho Sraom refused to stand idly by while the Prophets replaced Sangheili units with Jiralhanae packs, and now bears deep resentment toward those Sangheili politicians who landed his kind in their current predicament.

Although N’tho ‘Sraom’s romanticized nationalism is emblematic of all Sangheili, he has developed a healthy respect for humanity—not for their physical abilities or martial prowess, but for their audacity and resolve.

PLAYER 4 (Sangheili)

Name: Usze ‘Taham
Affiliation: Fleet of Retribution/Special Warfare Group/Fleet Security
History: Although Usze ‘Taham was born into a respected merchant family he was fathered by Toha ‘Sumai—one of the preeminent swordfighters of this age. Usze graduated with honors from the top War College in the Iruiru region of Yermo, Sanghelios (a distinction he shares with Rtas ‘Vadum). Shortly after receiving his first post within the Covenant Navy he was offered a place on the Prophets’ Honor Guard but he declined citing “lack of practical experience”. In truth, he had no desire to be part of a largely ceremonial unit, and at the end of his third combat tour, Usze ‘Taham again refused the post—even though his superiors warned him such behavior could be misinterpreted as apostasy.

Since that time Usze has evaded countless punitive actions, at least two assassination attempts, and served with distinction for two additional tours before the Schism. Following the dissolution of the Covenant, he was approached by the Ascetics to become one of their liaisons within the Navy.

The players will all be basically the same except for their appearance and the covenant starting with the Carbine as opposed to the Battle Rifle, but other than that, the new fellowship is all but set. 

Furthermore, expect to see the Loot Ninja guys playing the absolute shit out of this game, and we will need a fourth. Accepting applications now.