"Supergirl" season 2 premirers on The CW on Oct. 18 at 8pm ET. Facebook/Supergirl on The CW

"Supergirl" season 3 is expected to bring in more adventures and enemies following the events that went down during the season 2 finale. To date, there is no official word on who could be next for the Girl of Steel, though Lena Luthor (Katie McGrath) could finally follow the traditional Luthor route.

So far, Lena has been holding a great relationship with Supergirl (Melissa Benoist) and Kara Danvers. While most may not have noticed it, Lena Luthor is still technically unaware that Supergirl and Kara are actually one person. Could there be a change happening somewhere in season 3?

According to an interview by TV Line with “Supergirl” executive producer Andrew Kreisberg, Lena definitely thinks that they are two different people. Despite the fact that the Girl of Steel appears in climactic moments whenever Kara is around, the recurring scenario may at one point force Lena to dig deeper.

That scene could happen in season 3 of "Supergirl," begging to ask how such would affect their relationship. So far, Lena has been on the good side, but finding out that Kara is actually the cousin of her brother's (Lex Luthor) sworn enemy could spark conflict and push her to the dark side. That is a possible transformation that may eventually get complicated if Lena consults her mother Lillian (Brenda Strong).

As most know, Lillian Luthor runs CADMUS and isn't exactly one of Supergirl's biggest fan. A revelation could (finally) get Lena on Lillian's side, and most know what the former is capable of in terms of science and technology. None of this is official, though showrunners may have something close to that moving forward.

Other than that, fans are starting to make their own theories as to what lies ahead for "Supergirl" season 3. New foes are expected to pop up with Reign (Odette Annable) leading the way. According to another post from TV Line, Annable has been cast as a series regular for the third season to portray the DC baddie and give Kara additional things to worry about. There will be visual iterations to her character, though her role in the TV series is expected to be similar to the comics as a "Worldkiller."

Aside from Reign, there were glimpses of General Zod (Mark Gibbon) in the season finale. There is no confirmation for now if he will re-appear to cause havoc around Supergirl or maybe even Superman (Tyler Hoechlin).