As of the time of the announcement, the season was in production and the showrunners stated that it will focus on a smaller group of core characters. Later, Brandon Vietti revealed that they would be doubling down on the core season one characters that fans already know and love.
On September 5, Greg Weisman said on DC Daily that season four would have 26 episodes, and that there would also be another time jump.
By October 2019, voice recording was already underway and storyboarding commenced two months later.
On September 12, 2020, Weisman stated in a Q&A session during DC FanDome that their team has been working from home on season four. Pre-production was still underway despite the COVID-19 pandemic, but voice recording was being done individually by voice actors rather than in group sessions.
By November 23, all 26 scripts were finished and 22 episodes were fully recorded.
On March 25, 2021, Weisman announced that nine episodes were finished, five were in post-production and twelve were being animated overseas. Furthermore, pre-production was mostly done.
By July 1, all 26 episodes had been fully recorded, thirteen were ready for release, seven more were in post-production and the last six were being animated. Pre-production was also virtually complete. The entire season is being animated by Studio Mir.
As of September 23, nineteen episodes are ready for release and the remaining seven are in post-production. While a release date has yet to be announced, Weisman says they are in the "home stretch" of completing the season.
As of October 7, twenty episodes are ready for release and the remaining six are in post-production.
On October 16, the first two episodes were made available as a special surprise from DC FanDome. Greg Weisman later reported that starting October 21, one episode would come out weekly every Thursday until December 30.