DC Comics has placed a strong emphasis on its legacy heroes. Since the beginning of the Silver Age, the company has led the way in the idea of younger heroes taking over the mantles of their originals. The publisher has made a number of attempts to pass down its best titles to newer characters, but not all of them stick. Various eras of the publisher's history have seen clumsy and poorly received inheritances that weren't handled in the best of ways.
Source:https://www.cbr.com/dc-legacy-heroes-overshadowed-original-character/