We plan to release the DLCs as a part of the game for now (like the Halloween one). Then in the future we can gather them in a Stories, like a separate game.
Also you should see the improved Irena, she'll get new cool costume and a lot of nihilistic punk vibes. I've been writing a fun quest recently of John carrying her home after defeat to reeducate her into proper citizen (which unlocks an option of living together and dating in the end). She still won't stop attacking John.