RTF is a global modification that replaces all towns in the game.

As far as I know, nothing more has been conceived after Dark Messiah. The prophecy speaks of a maiden – an heiress of an ancient lineage, who could be Zana. Linna's death is necessary because then the prophecy about the Falcon lineage will be fulfilled, and the human empire will fall.

Linna's death is necessary?! – Where did that come from? If the new campaigns try to stay within the lore, then their plot should not exclude all possible endings of Dark Messiah!!!
- Can the player ensure that Linna survives? Answer: Yes, they can!!!
- Can the player ensure that Linna dies? Answer: Yes, they can!!!
Therefore, the human race may fall, or it may not, but it is not specified when exactly (tomorrow or in a hundred years), meaning that humans must exist, but it is quite possible that not in the form of a unicorn empire, but as part of something else. Furthermore, the fall of the human race does not imply extinction as a species, but implies a fall as an independent empire.