James Cameron's much-anticipated sequel to 2009's Avatar has crossed a production milestone. A message from the movie's Twitter account confirmed that November 29 was the final day of live-action filming for 2019. To celebrate, the producers shared a behind-the-scenes image that showcases the Sea Dragon, which is a "massive mothership."

It must really be a huge beast, as what's shown in the image here is only one part of the ship, which will ferry an "array of other sea-going craft" in the upcoming Avatar sequels. You can take a look at the ship for yourself in the image embedded below.

Although filming has passed a milestone, don't expect a first trailer anytime in the near future. "Unfortunately, not anytime soon," the Twitter account said about when a trailer might arrive.

In addition to this announcement, the Avatar Twitter account confirmed that Ubisoft's new Avatar open-world game, which is being developed by The Division studio Massive, is still in the works. Ubisoft has been quiet on the project for a long time, so some wondered if plans were scrapped. The game was announced in 2017 and is currently known only as The Avatar Project.

Ubisoft and Cameron (and his production company LightStorm) previously worked together on a video game based on the 2009 movie. It didn't fare well with critics, but it was a big commercial success with almost 3 million copies sold.

There is no word on a release date for this game at this stage, but a mobile game called Avatar: Pandora Rising is scheduled to release in 2020. The strategy and social game is coming from the entertainment company Fox's gaming division, which new owner Disney is reportedly trying to sell.

That's a wrap, Na'vi Nation! 💙

It's our last day of live-action filming in 2019, and we're celebrating with a sneak peek. 👀

Check out this photo of the aft well deck section of the Sea Dragon, a massive mothership that carries an array of other sea-going craft in the sequels. pic.twitter.com/AXgAve6aTG — Avatar (@officialavatar) November 29, 2019

The first Avatar sequel is scheduled to hit theatres on December 17, 2021. An additional sequel is expected in 2023, with two more potential films coming in 2025 and 2027.