Amber Heard's Mera joins the battle against Steppenwolf in the latest promo for Justice League. Warner Bros.' next DC film is one people have been waiting quite some time to see. Justice League will be a true launching point for the DC movie universe - as it brings back Superman, Batman, and Wonder Woman, but also introduces Aquaman, Flash, and Cyborg to the big screen.

It remains to be seen how in-depth Justice League goes with its exploration of these characters and their place in the greater DC cinematic universe, given the film's now-confirmed 2 hour flat runtime. One area that Justice League will for certain explore directly is that of Aquaman's underwater home, Atlantis. Amber Heard will also make her debut as Arthur Curry's fellow Atlantean, as well as his love and future queen, Mera in the film. The newest promo for Justice League offers a taste of Mera in action, following her brief appearances in the previous trailers for the movie.

Related: Justice League Image Shows Aquaman Underwater

The Aquaman Shrine shared a new promo from Justice League that offers up plenty of new footage, most notably a glimpse of Mera battling Steppenwolf. The scene takes place underwater and is likely when Darkseid's uncle comes to Atlantis to take their Mother Box. The Atlanteans won't go down without a fight, and it is here that they finally show off some of Mera's power.

More #Justiceleague, more Mera?! pic.twitter.com/9l0TPxR0ua— The Aquaman Shrine (@AquamanShrine) October 25, 2017

It is great to finally get a look at Mera's water controlling abilities, with her swirling the water around her to keep Steppenwolf away. This sequence probably goes hand-in-hand with previous moments of Aquaman (Jason Momoa) battling the League's first foe. There has yet to be any indication that Mera is involved later on in the film and helps the League battle Steppenwolf in the climax, so this may be the only time in Justice League that audiences get to see her power on display. Thankfully Aquaman is next up on the DC docket, so audiences won't have to wait too long to get their next look at Mera in action.

The rest of the footage is very action focused, but that is not uncommon for 30-second clips like these. Cyborg is shown quite a bit in the promo, making this possibly part of the marketing rollout for Cyborg Week. There's also more looks at what is believed to be the opening sequence of the movie and Steppenwolf's first (failed) attack on Earth many years before, including a look at Connie Nielsen's return as Hippolyta. The marketing push for Justice League is officially in full swing, so these will hardly be the last pieces of new footage to be released.

NEXT: Aquaman & Cyborg Don't Get Along At First in Justice League

Source: The Aquaman Shrine

Key Release Dates