Spoiler's ahead for the Supergirl Season 4 premiere. The Season 4 premier of Supergirl kicking things off in the usual fashion: with the Girl of Steel saving the day just in National City, but all over the world. From catching an art thief to stopping a train from a crumbling bridge in Kaznia, Kara proved to be just as heroic as ever. The final moments of the episode, however, brought up several questions. Chief among them: What is the second Kara doing that warranted her punching way through rocks underground? She's definitely a woman on a mission, but to what end?
Let's back up for a minute here. The second Kara was first introduced at the end of Season 3, when she left Supergirl's body during her battle with Reign. So, this is just the second time viewers have seen her. This particular scene starts in Kaznia, and Supergirl raced to a full stop. At first, it seemed like it was a random incident, but there was good reason for the bridge's case: Below where it used to stand, the second Kara was using it to deepen, unintentionally (or maybe intentionally ) making it structurally unsound.
The episode ended before we could find out what it is, exactly, the second Kara is doing or what she is trying to get to, but that does not mean we're completely in the dark. The one clue we're given is the fact that she's dressed in military uniforms. These are presumably Soldiers from the same military base. We saw them approaching at the end of last season when they were first (and accidentally) created.
Shortly after the Season 3 finale, TVLine spoke with executive producers Robert Rovner and Jessica Queller about that Kara doubles twist and what it means for the show moving forward. Red Com which told an alternate origin story for Superman, "Rovner told the outlet , Added Queller: "What happened if ̵
Of course, this scenario centers around Supergirl rather than a baby, but the idea itself is pretty similar. So she wants to be more of a friend or a foe?
It's also possible this alternate Kara is a result of the meddling real Kara did last season. After she threw her "no killing" rule out of the window and lost everyone in the process, she used Mon-El's Legion. Kara almost became?
Those who watch The Flash know that messing with the timeline can come with severe consequences. Perhaps Kara is about to get a taste of that firsthand.