No, it is not a teaser for a Disney+ series. This is the teaser for the coming of age superhero story, Stargirl.
With an exclusive linear deal between the streaming service and The CW that finds the live-action superhero series airing on The CW a day after it premieres on DC Universe (with the series expected to debut the second quarter of 2020), Stargirl looks to be in good shape heading into 2020. This news further convinces me that once HBO Max arrives, DC Universe will either be folded into its service or be shut down altogether.
In DC Universe’ Stargirl, Brec Bassinger’s Courtney Whitmore finds her smooth-going high school experience derailed when her mother marries and moves the household from Los Angeles to bucolic Blue Valley in distant Nebraska. Struggling to adapt, Courtney discovers her stepfather has a secret past as a superhero sidekick. She also discovers an artifact of immense power – a long-lost hero’s cosmic staff – and ends up on a journey to becoming the unlikely inspiration for an entirely new generation of superheroes.