In Sicario, FBI agent Kate Macer is pulled into a dangerous operation targeting a Mexican drug cartel, where she quickly realizes that the lines between good and bad are not as clear as she thought.

One key moment is when Kate, disillusioned with the brutal tactics used by the task force, faces a moral dilemma during a raid in Mexico. The operation spirals out of control, forcing Kate to confront the ethical gray areas of her mission. This turning point challenges her belief in justice and forces her to question everything she stands for.

Some fan theories speculate that Alejandro, the mysterious operative, is secretly manipulating Kate’s involvement to settle old scores, possibly even using her as a pawn in his revenge against the cartel. What if Alejandro had a hidden agenda all along, manipulating the whole situation to create chaos?

In an alternate ending, Kate could choose to walk away from the mission, rejecting the morally ambiguous world she’s been dragged into. A prequel could explore Alejandro’s past, showing how he became a man so deeply entwined with the cartel, and how his thirst for revenge began long before meeting Kate. This would reveal more of the dark forces at play behind the scenes.