No release data/visual/PV yet. There is more info going to be released during a panel at Anime Expo on July 4th.

If you are unfamiliar with the first movie, from the article:

Warner Bros. released the Batman Ninja anime film digitally in April 2018, and on home video in May 2018. The release included the Japanese audio track as well as the English dub. The anime debuted in Japanese theaters in June 2018 with the Japanese voice cast. The film aired on Toonami in October 2021.

In Batman Ninja, Batman travels back to Japan’s Warring States period and defeats villains such as The Joker, who have become feudal lords.