First of all, I hope that these DLCs are like TTK sized. Activision did say that they’ve invested in assets for Bungie to avoid content droughts.
I’m happy about what the expansion icons are suggesting because this time it would really fit into the story of the base game which is to regather human forces to establish an HQ/safezone/home anew in order to fight back the Cabal.
The 1st DLC could be about finding a new speaker & since Osiris left the Tower in disagreement with the Speaker, the appearance of Saint-14 could bring some dynamic into our side of the story.
The same with the 2nd DLC, we might finally see where Rasputin stands & maybe we’ll get some light into the whole Felwinter-Rasputin relationship. It could also be an opportunity to finally introduce the Seven Seraphs (in case the speculations about them being related to Rasputin turn out to be correct).
In general I have this feeling that in D2 the factions might actually have a bigger inpact in the story. There was a sneaky emphasis on New Monarchy within the teaser & story trailer.
I really think that the whole lifecycle of D2 will be focused on us guardians, on humans maybe even in-game entrance of the Concordat, the Shadows of Yor, the mysterious place Efrideet’s talking about & maybe even the Nine.