After release... weekly something

Okay, admittedly I am some what of a late comer to Halo. I know that Halo has had double XP weekends but since we don’t know to much about the multiplayer elements but using your imagination what kind of weekend draws would you like to see for Halo 5?

I am a coop kinda guy so I’d like to see some special firefight/Spartan ops missions that advance the lore of the universe in some small way or tell a story within the universe that is unique from any story or coop play already released with the game. Now as an added bonus, say if you beat the mission(s) on legendary/laso you unlock a unique armor/weapon skin or other bonus.

Any other thoughts or ideas?

Halo 5’s gameplay should be able to stand on its own. That should be the main reason people keep playing the game