The Hints That Reveal Margaery's True Intentions on Game of Thrones

After seeing that state Loras is in, Margaery does a complete about-face. She kind of leads Tommen along in a conversation, not really saying the High Sparrow is good or bad, just "different" from what they thought. She says everyone needs to atone for their sins, sooner or later, one way or another. "The gods have a plan for us all," she tells Tommen.

Now, it's true these words are more or less in the context of Margaery's brother, Loras. But given the vague, ominous way she discusses the topic at large, it's hard not to see how she could be referring to the High Sparrow as well.