I think the new "A" is Alison , she faked her death so no one would think she was sending her self texts and that Aria is her helper and Mona was just a member of the A-Team. The only proof i have of Alison being the new "A" is she started receiving texts from Mona after she became friends with Aria,Emily,Hanna and Spencer. She helped Aria trash Byron Montgomery's office. she wears the Vivian dark bloom coat. Aria's never been physically attacked by "A" or have flashbacks or Hallucinations of Ali or Her possible twin Twin. "A" also trashed Dr. Sullivan's office using the same jungle red lipstick aria used to draw an "x" on her dad's face on a family picture.
At first it's not the new A, it's the Team A which used to include Mona. And I doubt Jenna Marshall, for some reason Noel Kahn. And I think one of the A's threatens Lucas to do the things he's doing, or maybe I'm denying the fact, I just can't believe he might be guilty, I believe there will be an explanation.
I was starting to think that maybe it was going to be Maya. But then they found her body, so i kind of ruled that one out. Umm i'm also thinking Melissa, cause she's been keeping so many secrets and she's constantly lying. My mind at the moment is Melissa. She was also the one in the Black Swan costume. What do you guys think? <3