[SPOILERS for those not caught up on Supergirl ahead.]

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Supergirl is the newest addition to the Arrowverse line-up of DC Comics television shows. The saga of Superman's displaced cousin, Kara Zor-El (Melissa Benoist), is moving towards wrapping-up its sophomore season and still going strong, ahead of a musical crossover episode with fellow Arrowverse series, The Flash.

The arrival of two new mysterious baddies, played by 1990s television icons Kevin Sorbo (Hercules) and Teri Hatcher (Lois & Clark: The Adventures of Superman) are about to heat things up for Supergirl. A new video preview of next Monday's episode, "Star-Crossed", gives fans the first peek at Hatcher and Sorbo's appearance on the show.

The CW has released an episode preview that features Hatcher, in full costume, making her first appearance in National City. Hatcher is adorned with a crown and is clearly exuding a regal attitude. The video also includes with a few scenes that may indicate that there is more to Mon-El's past than he's let on to Kara and the team, and a possible connection to Hatcher and Sorbo's characters.

Teri Hatcher on Supergirl

A common fan theory that has been making the rounds this season is that Mon-El (Chris Wood) may, in fact, secretly be a Daxamite prince. This idea was sewn further into the minds of the viewers when the vicious Dominators intervened as a guard was about to shoot Mon-El, telling him that he cannot harm him in the mid-season premiere of season two, titled "Supergirl Lives". The Dominator then proceeds to bow before Mon-El, as if he's royalty. If Mon-El is the prince of Daxam it's not a fact that's lost on him, he's already indicated to Kara that he's harboring a secret with regard to his home planet.

The video preview features a scene in which Sorbo and Hatcher are sitting at a dinner table with Mon-El and Supergirl and Hatcher proposes a toast to the "Prince of Daxam", followed by Kara telling Mon-El that "This changes everything." It's still very possible that the scene is a misdirection for the audience, since it would otherwise be revealing a significant spoiler. Mon-El's secret could have to do with other, as-yet unrevealed events that occurred on Daxam.

This new possible angle between Mon-El, Hatcher and Sorbo is certainly interesting, right off the bat. If this theory proves to be true, then hopefully Mon-El's continuously entitled and arrogant attitude will be toned down by the show's writers from hereon out, since there will no longer be a need to telegraph his big secret. That way, the love drama between Kara and Mon-El may be more palatable to the audience.

NEXT: Is a Supergirl/Lena Luthor Romance Possible?

Supergirl continues Monday, March 20 with 'Star-Crossed' at 8pm on The CW.

Source: The CW