Status: TBD
It’s pretty much a sure thing that Cersei is planning something dastardly in retribution for her imprisonment and walk of shame, but we’ve yet to see it.
Original Theory: Do we really think that Cersei Lannister would let herself be paraded, naked and bloody, through King's Landing without a plan for revenge? Not her style, especially when she's got a veritable Frankenstein's monster — The Mountain — on her side. There's also quite a bit of theorizing that the Tyrells and the Lannisters could be pitted against one another due to manipulation by the High Sparrow.
Furthermore, Jaime Lannister will likely be thirsty for vengeance against the Faith Militant for torturing, humiliating, and threatening his sister/lover's life.
It'll be interesting to see how it plays out.
