Supergirl Season 4 Finale: What Does The Ending Really Mean?

4. Lena Luthor Finally Knows Kara's Secret

Even in death, Lex Luthor wanted to make his sister's life miserable, so it was hardly shocking when he gleefully used his last few breaths to inform Lena that all of her friends had been lying to her. Using video footage to support his claims, the dying Lex told her the biggest secret that she was never even aware of her: Kara Danvers is Supergirl.

Of course, the discovery shocked Lena, leaving viewers wondering what it all means going forward. Well, the truth is that it's hard to tell because, given that we're talking about a character that has had more near-heel turns than anyone else on the show, this just might be the betrayal to push her over the edge for good. On the other hand, she knows exactly what it's like to keep secrets and, after some time, she may grow to understand why Kara never told her the truth.

The fact of the matter is that this information is out there now. The status quo has changed: Lena knows that Kara is Supergirl and there is absolutely no way of undoing it. So, whatever happens, it's going to lead to some pretty great conflict in Season 5. Let's just hope that this conflict doesn't go too far.