News thread: https://culture.vg/forum/topic?t=7230
It's dropping on October 7th and like Far Cry 5 the campaign will be fully playable in co-op.
I haven't picked up a copy yet, but I'm aiming to play on or near launch (on PC of course). Since we beat 5 together Diamond Dawg gets priority, but if he's not interested I'll be looking for someone to play it with.