Another year of additional DLCs to Civ VI (which is what another NFP-type pattern would require) runs into two major influences, as I see it:
1. The current game's basic balance is still askew and getting harder and harder to rectify as they keep adding 'bells and whistles' to the creaking structure. We still have a moribund AI, dull last third of the game, poorly balanced Unit progressions. promotions and types - basically, stuff we've been posting about for Years which has not been addressed in NFP or anywhere else. Addressing them comprehensively would, at this point, effectively produce a New Game.
2. Humankind, the potential Bear in the Bathroom - you might try to ignore him, but it's very difficult. That game comes out in April next year, and comparisons are inevitable, especially since that game looks at a lot of the 'traditional' 4x Historical gaming tropes in entirely new ways. Since traditional 4x Historical Game = Civ, there will be a lot of pressure to relook at the Civ mechanisms - again, any such implementation will result in a completely new game.
For these reasons, I am skeptical of any major DLCs after NFP: I think the pressure will be on to produce a massively improved/changed Civ VII instead of trying to compete with a new game by incremental 'improvements' to Civ VI. Unless, of course, Humankind does a major Face Plant, but that does not look likely given the amount of positive press and comments it has received so far, including from members of these forums.