Gadgets 360 says: ‘According to Ubisoft Associate Creative Director Chadi El-Zibaoui, The Division 2 endgame is an “extension” to the campaign.

“First thing is, we have a huge endgame offering it’s not just PvP [player versus player],” he said in conversation with Gadgets 360. “[T]he endgame is going to open an extension to the campaign there is a narrative twist, with the Black Tusks invading Washington DC, there are a lot of narrative reveals around that. This will cater to players who want more narrative content, and play more solo or PvE [player versus enemy].”‘

Source: N4G PC The Division 2 Endgame Is an 'Extension' of the Campaign: Ubisoft