All these Cece things are being spoiled so easily? It's a distraction for the real A?
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Not going into all the details but this is what I think will happen:
Wren is Big A/Charles. Cece was working for him(or is secretly good and against him cuz really Alison needs someone who she can trust) as Red Coat. It was a distraction for the longest that she was A, and then suddenly NOTHING. She's gone. Same time as Ali came back and Cece was involved in Wilden's murder, she left town etc. OR it's the other way around and Cece is Big A & Wren is the person who just supplied everything, changed medical records, fought the girls, etc.
Cece was on the run & Wren was in London around the same time. So who was doing A things? MELISSA. Melissa is Black Widow and knows Cece & Wren are working as a team. I feel she may lead the girls to unmasking them if they haven't gotten to her already. Then she'll come out and tell the girls she was the one who was protecting them. Hence her being "endgame". Still up in the air if Ezra knows more or not. I feel like he has too. This is from MK's snapchat:
No offense to you King Maxx (and I don't include you in this), but these Wren supporters are rude af when they don't even have their own theories. 
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Spoiler
