For example it could be a heist crew, A superhero squad,A private guard division, or anything you want.
Mine would be
Purpose: An Elite team of Individuals who intervene
When things get too dicey for or ,The Justice league itself cant be trusted,they monitor the league separate from the rest of the leagues knowledge. And they also take on side gigs to peice together a mystery that brought all of them together.
Second in command/team trainer: Wonder Woman
Recon/Informant and resident unstable reformed villian:Harley Quinn
Recon/Environmental specialist:Beast Boy
Muscle/Guardian of the base: Cliff Steele
Muscle/Guardian of the base(reformed villian committed to atonement in this scenario):Mammoth
Guardian of the base/Robotics expert:Red tornado
Magic Specialist/Defense advisor:Zatanna