Well, without having read the 'Days of Futures Past Novel', it's hard to say precisely. However, if we look at the title, it gives the impression of a narrative that is set in the future, but with a connection to the past. It might be a story that shows how the past actions or events have shaped the future days. For example, it could be about a world where past mistakes in technology or governance have led to a particular type of future. There could be characters who are on a journey to either correct the past's influence on the future or to adapt to the new future days that are a result of the past.
The 'Days of Futures Past Novel' could potentially be a story that delves into the various aspects of a future world. It might have themes like time travel where characters go back and forth in the days of the future past. Maybe it shows the consequences of actions taken in different future timelines and how they all interconnect. It could also be about a group of people trying to survive or thrive in a post - apocalyptic future that has a past of its own, filled with events that led to the current state of affairs.