Wow, now this is some huuuuuuge news! DC Comics is currently trying to fix their overall timeline and they just announced the biggest change. Wonder Woman will officially be their first established hero, not Superman!
According to most timelines this would make sense. After all, Wonder Woman fought in World War 1, where as Superman’s arrival on Earth has changed from the 30s to the 60s then to the 80s and now I’m assuming the 90s.
This also obviously ties the new DC Comics timeline much closer to the events of the Wonder Woman movie series, in which she has been firmly established as the first hero of justice in the DC movie universe. Even if her exploits during WWI were kept secret, it’s hard to imagine that by the events of the upcoming Wonder Woman 1984, she’ll still be such a clandestine legend. So again, this is fitting change to make.