You know, I saw that a 'future Avengers' team was going to appear in New Avengers #5, and they were the same team from a 'good future' that Al Ewing showed at the end of Ultron Forever. The thing is that this team had a future version of Vision in it as well.
So I asked Ewing to clarify, whether his future-Vision is from the current post-Secret Wars timeline, or from the 'good future' timeline that he wrote prior to Secret Wars. Ewing confirmed that 'his' Vision is the same Vision that's in the current timeline and the solo; aka King's Vision. Interestingly, he implied that Vision in the future doesn't have the 'issues' of the current Vision.
I'm going to assume that Ewing's not putting it lightly, and that he did at least discuss with King whether their two Visions were the same or not.
Just an interesting wrinkle to the whole thing.
I was thinking that the narrator is possibly a future version of Vision, narrating events in the past, remarking on them as the events go by hence commenting on events in the story 'as they are recollected' but in the past tense (like director's commentary). But then the speech patterns don't really match with how Vision is usually written.
The only other thing I can figure is a Watcher or something, but they don't usually comment on inner-thoughts or have the ability to even read inner-thoughts, AFAIK.