Betrayal in Athyr was going to be the third game in the Betrayal series.
...Betrayal in Athyr was planned as the third RPG in that set.
About a year into production, Marketing raised concerns that series games weren't doing as well as new titles. Since the Betrayal games were all unrelated worlds anyway, we renamed it Raven's War to better fit the story. Unfortunately, it was eventually cancelled.
- Cindy Vanous, pers.communication 7/20/2021