Julian Gerighty and Mathias Karlson spoke about raids in an interview recently, shedding more light on the endgame content. They stated these instances will have unique mechanics compared to Incursions and Legendary missions from original.
The Division 2 endgame will be vastly different from what The Division had at its launch, primarily because there will be actual endgame content. Massive Entertainment managed to add enough content over the years through updates, such as Resistance, Underground, Survival, Legendary Missions and more forms of PvP.
According to information coming from Gerighty and Karlson during an interview with Arekkz Gaming, The Division 2 will have a lot more to offer from get-go, with raids being the primary focus of the hardcore players. Karlson specifically stated that The Division 2 raids will not only differ due to being eight-player instances, but they will also have "bespoke mechanics, bespoke boss fights..." meaning that this content is specifically targeted for the players belonging in cream of the PvE crop.
In addition to this, the raids will apparently utilise the already existing systems such as shooting mechanics, specialisations and RPG systems to the fullest, on top of having that "social puzzling element" that is inevitable in creating competent teams.
Arrekz tried to squeeze out a bit more information by asking about squad wipe mechanics, but Karlson and Gerighty weren't at the liberty of divulging such information yet. Karlson did add "it's not going to be easy" though, but then again, nothing less is expected from top tier endgame content.
While the raids seem to be ready for launch, they will not be coming immediately though. Ubisoft and Massive Entertainment have apparently decided to add them in a post-launch update, but they will not wait too long with it. Gerighty stated that the reason for the delayed release is that players will need some time to gear up and actually reach the power level necessary to complete a raid.
You can check out the entire interview in the embedded video above.