Originally Posted by
Restingvoice
Future State is an alternate future, full stop.
Batman event Fear State was the beginning of events that would lead to Batman Future State if the villains succeeds, but they didn't.
About Everything is Canon
Everything that's been published by DC as the main continuity story, from 1938 into now, is canon as one single big long timeline, separated into Crisis reboots. The reboots and their process is canon in the story.
A lot, not all, characters, now also remember what happened in their previous continuity, showing up in flashes of memory. Deathstroke, for example, remembers his daughter Rose taking out her eye in previous continuity, although the current Rose has both her eyes.
Aside from events actually mentioned or shown in the books, though, they're not clarifying what's canon and how it happened in the current, post-Infinite Frontier continuity.
What this means for new or casual reader is you're supposed to just take what's written in the current books and not think much beyond that, maybe look up the events they referenced in the past books available now on amazon and comixology, thank you
It's the long time fans that's pulling their hair trying to keep up with the change, and maybe tweet the authors that they're doing things wrong