I personally wouldn't be surprised if they're already putting in the foundational work for Civ VII, especially with Humankind on the horizon. One reason I hopped on a Civ hiatus was because I got to play Humankind in the beta, and already I feel like Firaxis is in big trouble if Civ VII doesn't radically shake up the franchise. There's so many good ideas present in Humankind already that make it far, far more appealing to me than Civ VI in a lot of ways. Seeing the new ideas in that game compared to how unfortunately tame Civ VI's introductions were (even though there's a lot of great ideas present in Civ VI) and the way they were applied into the game felt a lot better than in Civ VI (for instance, as much as I love districts, they could be a lot better). If Humankind is a success, I hope it's a big wake up for Firaxis, because as much as Civ VI frustrates me, I still love the franchise and its personality (which that, at least, is an advantage it has over Humankind). That said, I doubt they're hard committed on Civ VII if they're working on it right now, just setting the groundwork. I think the balance patch in April is a good sign that they're wrapping up development on Civ VI. However, I also think there's a lot of room to grow in Civ VI as well, so I wouldn't be totally surprised if there's a final expansion or a "Final Frontier" pass. The NFP introduced a lot of gameplay mechanics, some of them really cool (Secret Societies and Heroes/Legends) and some of them underwhelming (lookin' at you, Apocalypse Mode). The new districts also tells me that mechanics has a lot of room to be fleshed out even further, and there's a lot of creative Civ designs they can still work towards. I've really loved all of the NFP Civ designs, even the underpowered ones like Maya are still cool from a design perspective. On top of that, if we're to assume that Portugal is the last Civ to be added (just makes sense to me), then we still have a huge blind spot for African and Native American Civs, on top of some pretty influential Civilizations that we're leaving out (Austria, Siam, Denmark, Italy/Florence/Venice, Assyria), and a lot of Civs you could throw an extra leader onto (Egypt, Arabia, Germany, Russia, and Rome are the ones that jump out at me the most). This post went on a lot longer than I thought it would, but TL;DR: I'm going to assume that April will mark the end of Civ VI's development cycle, and they'll probably start working towards Civ VII to better compete with Humankind, but I also wouldn't be totally surprised to see a Final Frontier Pass if it happens.