I am a big fan of the division and have a few ideas for other content.
Conflict - Faction Wars
4 teams of 4 battle it out as the different factions - Hyenas - True Sons - Blacktusk - Outcast. - premade characters as they are in the game.
new take on PvPe - An Opt in feature to where 1,2, or 3 players can spawn into your map as an enemy faction, trying to take you on.
PvE manhunt system - ability to kill civilians ( like the ones that stole the water i was collecting) and have a manhunt status in PvE where the civilians try to mob you down (sometimes with golf clubs)
just a few different ideas to breath life into the gameplay, characters, and story