The world of DC Comics is full of fun and interesting characters, ranging from noble superheroes to maniacal villains and everything in between. The shared universe has managed to incorporate a wide variety of heroes into its canon, all with their own unique designs, motivations and personalities. However, not every one of these heroes was actually created for the company, and many were later additions to the universe. Despite not fitting the traditional DC mold, many of these heroes have become firm fixtures of the universe, and have grown into fan-favorites.
Source：https://www.cbr.com/10-best-dc-heroes-that-werent-created-by-dc/
