The Sparrow Academy has only appeared once in Netflix and became an instant success. The series was later renewed for a second season, which dropped in July 2020 and surprised viewers with its many twists and big reveals.
The Umbrella Academy follows the Hargreeves, seven adopted siblings who along with other 36 babies were born on the same day, at the same time, and to women who weren’t pregnant when the day began. This event caught the attention of billionaire and scientist Sir Reginald Hargreeves, who set out to adopt as many of those babies as he could but he only got seven – and that was enough for him. Reginald trained them as they developed superpowers and formed the team “The Umbrella Academy”, but the kids ended up parting ways, and reunited many years later for Reginald’s funeral and to stop the apocalypse. Unfortunately, they failed to stop the end of the world, so their only chance to survive was to jump to a safer place and point in time, so season 2 saw them landing in Dallas, Texas, between 1960 and 1963.
As they all landed in different years, The Umbrella Academy season 2 saw them reuniting in 1963 and stopping a new apocalypse, succeeding this time, but they also ended up making some big changes to the timeline. The Hargreeves met Reginald in 1963 and it was quite disastrous, which directly impacted their future, as when they landed back in 2019, they learned that their team doesn't exist, Reginald is still alive, and he created a different team: the end of The Umbrella Academy season 2 shows they have a better relationship with Reginald than the Umbrella team, shown by the simple fact that they are still together.
The Umbrella went their own ways due to Reginald's poor parenting skills and extreme training methods (such as the Sparrows a big advantage as they have been working together for longer than the Umbrellas.
Of course, Reginald's presence could also be an obstacle for the Umbrella Academy in season 3, as the Sparrows having a better relationship with their father doesn't necessarily mean that he has had a positive influence on them, affecting the Umbrella Academy's work in the season – and, of course, it's to be seen what Reginald's real plans with the Sparrow Academy are.