Just a few theories about who -A could be. And where the story might be headed. Some people on here are really creative and so I can't do anything except reading a lot theories and wondering what will happen next.
All the answers are in 4B right? Ezras apartment is 3B. Also, in an interview it was said "Allison may not be the one with a twin" Meaning possibly ezra could have a twin in 4B. You never know, because now Ezra is being referred to as "Jekyll and Hyde"
so if Alison isn’t the one with the twin than it is possible for another character to have twin. So maybe it’s Ezra. It would be an interesting storyline if there was an evil Ezra twin but I think it would be interesting as well to see the original Ezra as a kind of a psychopath.
During all the seasons he was the nice guy and always caring for Aria or helping Emily etc. So he really deserve a good storyline cause let’s be honest the Malcolm thing wasn’t a good one.
But if they aren’t going with the evil twin thing then it’s possible we get to see the two-different-personalities thing, which I wouldn’t mind at all.