We theorized that Mona Vanderwaals mom (Leona) was in the barrel. The past two episode confirmed that Mona has been away with her mom, which sort of debunks our theory.
If Mona and Leona are alive, Bethany Young is in the grave, and Sara Harvey is also alive, it begs the question of who is in that barrel? It’s a possibility that nobody was actually in the barrel all along, but remembering back Peter Hastings did say there were bone fragments. BUT, were they bone fragments from a human, or from an animal (hint: a dead pig). It wouldn’t be the first time a pig has been used (e.g Wildens trunk, Alisons bedroom). We’re hoping the wait is worth finding out what is in that barrel!