Regina (Lana Parrilla) and Emma (Jennifer Morrison) are in for some action-packed storylines going forward in ABC's Once Upon a Time as they both continue to grow as people.

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Once Upon a Time co-creators Edward Kitsis and Adam Horowitz recently spoke with Entertainment Tonight about Regina and Emma being explored further in the second half of season 4. Kitsis teased an exploration of Regina meeting Maleficent (Kristin Bauer van Straten) in the past.

"I am excited for fans to see when The Evil Queen first met Maleficent and we get to learn more about their history," Kitsis said. "And we're excited for Snow and Regina to continue their friendship."

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As for Emma, Horowitz revealed that her magical powers may tackled as a storyline, in terms of her emotional reaction to having them.

"For Emma we are going to continue to explore her powers and what being a Savior and those powers mean and all facets of that," Horowitz said. "She's been very close to people who use magic for good, and with Regina it was people who used magic for evil. Even though Regina has been on a path of redemption, with Emma's it certainly has opened up the possibility of many different magical powers."

Once Upon a Time returns for the second half of season 4 on Sunday, March 1 at 8 p.m. ET/PT on ABC.

Watch the promo for the next episode of Once Upon a Time below:

Tags: Once Upon A Time television ABC