With production starting on Aquaman this summer, we recently saw a video with star Jason Momoa training for his role as Arthur Curry, along with a photo of Amber Heard practicing her swordplay skills for her role of Mera. Over the weekend, Amber Heard posted a new video showcasing another part of her training, where she's seen practicing her hand-to-hand combat skills, in a most impressive fashion. While there is still not much we know about Mera in Aquaman yet, it seems clear that she is not one to be messed with.

Amber Heard herself posted this brief nine-second video to Instagram over the weekend, showing her training with the 87Eleven team, a company that was founded by John Wick directors Chad Stahelski and David Leitch. While the founders weren't present in this video, she is seen training with Jon Valera. Earlier this week, Amber Heard posted a training photo where she was seen practicing with a fake sword, revealing that she was being trained by accomplished martial artist Li Jing, who has worked as a stuntwoman on big-budget movies such as Pacific Rim, The Last Airbender, Rush Hour 3 and The Fast and the Furious: Tokyo Drift, just to name a few.

We reported earlier this month that Warner Bros.' has pushed the Aquaman release date from October 5, 2018 to December 21, 2018, which comes just a few months after it was pushed from July 27, 2018 to October 5, 2018. No explanation was given for the release date shift, and it remains to be seen if this will affect the shooting schedule, but it's possible that this move was made to give director James Wan more time in post-production. If that is in fact the case, then production may still be slated to begin this summer. Aquaman will now go up against Sony's animated Spider-Man movie in its new release date.

Related: James Cameron Has Very Mixed Feelings About Aquaman

Aquaman also stars Willem Dafoe as Nuidis Vulko, Patrick Wilson as Ocean Master Orm, Nicole Kidman as Aquaman's mother, Atlanna and Yahya Abdul Mateen II as the main villain, Black Manta. There have been reports that the production is eyeing Temeura Morrison to play Arthur Curry's human father, but it hasn't been confirmed if he has signed on quite yet. No story details have surfaced, but director James Wan has compared this story to the adventure classic Romancing the Stone, teasing that both Aquaman and Mera don't exactly get along too well when they first meet.

James Wan, who is directing from a script by Will Beall, based on a story that the director came up with alongside Geoff Johns, has also confirmed that the DC Comics character Aqualad will not show up in the Aquaman movie. Jason Momoa recently praised the script, making a bold statement that Aquaman will show fans a world they've never seen before. Fans will get to see both Aquaman and Mera in the highly-anticipated Justice League movie, which hits theaters on November 17. As we get closer and closer to production starting on Aquaman, take a look at this new video revealing part of Amber Heard's latest fight training session.