[Update]: Risk of Rain 2 will be getting its very first expansion in early 2022 - Survivors of the Void.
Even though Risk of Rain 2 was fully completed and released last year, the Hopoo Games team has now decided to release another massive update as a way to say 'thanks!' to all their fans. The appropriately titled Anniversary update brings with it Bandit as a brand new survivor, a variety of new items and skills, as well new monsters and even a boss!
The good news doesn't end there, however, as the update has also brought in some serious improvements to old content alongside numerous quality-of-life changes. As such, the final stage has been redone entirely and now features a more interesting area to play around in, while the AI pathfinding has been greatly improved across the board. The latter will be especially handy for friendly minions as they will now not only effectively stick around players, but thanks to other tweaks will also scale better as the difficulty level rises.
As is tradition, the update has also brought in an impressive amount of balance changes and bug fixes. These are basically impossible to summarize since they're all highly specific, so if you're interested in all of the details you can find the full patch notes over at Steam.
When it comes to future content, I'm also happy to say that Hopoo Games have a big expansion planned for Q4 2021. The exact details are still few and far between, but you can look forward to a new game mode, new survivors and bosses, new item tier and elite types, as well as generally fun stuff like new stages, music and skills.
Once more information becomes available I'll make sure to let you know. Until then, enjoy the Anniversary update as it's a pretty nice one!