Witches. I'm surprised this hasn't been done, it sounds amazing. Witches are always the bad guy, pretty or ugly. I really want to see Barbie and her friends as cute sparkly witches with pointy hats. And witches are usually in covens, which goes along with the recent Barbie Movies giving Barbie two homies that follow her around. It can be modern witches or a more fantasy world, but I can see this doing really well, and the dolls would be so cute.
Pirates: This is something I would have loved to see as a kid. I was a girly girl, but loved playing with pirate related toys. Barbie, and all her friend group (which is the main thing I like about the new movies) as the crew of a ship of good pirates. It would be Barbie finally back in a historical role, and she is a princess about to be married off to an awful prince. She runs away from her castle and comes across a beautiful pirate captain. She offers the princess an escape takes her to the ship, where she finds friendship with the crew members. Tbh I kinda want to have Daisy play the role of the captain
The Snow Queen: It's a fairytale they didn't do. Since Chelsea got her own movie, I think it's time someone who's been in Barbie Movies forever to get her own movie.... Teresa! Starring Teresa as Gerda and Nikki as Kai, because honestly because of Dreamhouse Adventures I think I'm starting to ship Nikki and Teresa. And either Skipper or Stacie as the Little Robber Girl. And guess who would play the Snow Queen? Barbie! Every actress knows it's fun to be the villian, and it's about Barbie's turn. She would still get a pretty doll too because the Snow Queen is basically just Elsa. There'd be a pretty dress transformation for Teresa too, she gets a dress of ice crystals, based on the ending where Kai has to spell words out of ice crystals but Gerda comes and finds him and they kiss and then dance around because Kai remembers her, and the crystals swirl around them and then land on the ground successfully spelt in the word, but in my idea the crystals also give Teresa a shiny dress.
Changelings: This could be with original characters or not but the theme is simple. Faes switch their own children with human babies. My idea if it's not about original characters it's a sisters movie. Skipper turns sixteen and wings begin to grow from her back. She realizes there is a reason to why she looks different from her family. She, Barbie, and the other sisters go on a trip to an enchanted forest, where they find the fae folk and the REAL Skipper, who is biological related to the Roberts and looks like the vintage Skipper. They become close friends, maybe even love interests, but it's a movie about family ties, and after each girl tries out what was supposed to be their life they miss their home and go back. It would be a good lesson for kids about adopted family IS family.
Zombie Apocalypse: This could be a fun concept if their wanting to stick with the Dreamhouse Adventures continuity. It could fail and be cheesy, but I think it'd be pretty cool to see the girls being really badass, perhaps they have to rescue Ken and Stacie and Chelsea from where they are blockaded in the Dreamhouse or something. Just so it's a girl saves the guy thing.