While answering a number of questions about the upcoming expansion from Game Informer, game director Steve Cotton and project lead Scott Taylor both said that there is a lot to do and discover even as a solo player:

The developers mentioned that solo players can matchmake and play Gambit, the game’s new PvE/PvP hybrid mode. Cotton also mentioned that when solo players travel to The Dreaming City, Destiny 2’s new hub for endgame activities, as it has been described, there are things to discover “that are very interesting for solo players.”

It will definitely be interesting to see how the Destiny 2 experience changes for the solo player as the game undergoes a radical transformation between the upcoming Forsaken expansion and the version of the game that launched last September. At launch, Destiny 2 focused more on the casual player, giving more avenues to level up even outside of endgame activities and attempts to get solo players grouped up with features like Guided Games. But over the past few months and now with the impending release of Forsaken, the game has returned to some of its more grindy and group-focused gameplay that was so prevalent in Destiny 1.

However, according to the developers, the solo players have been kept in mind during Forsaken’s development, so those players will have to make the final judgment next month when the expansion launches.

Destiny 2: Forsaken releases on September 4, 2018 for PC, PS4, and Xbox One.

Source: Game Informer