Since DC kicked off Rebirth, DC has insisted that the new branding on their comics was not a "reboot." Unlike The New 52 which came before it, DC has insisted that Rebirth is a new chapter in the same story, not a new story. Your mileage may vary on how much water that claim holds or if that distinction even matters. But trying to define Rebirth by what it doesn't seem frivolous when there is so much to say about what it is.
Action Comics Reveals Mr Oz's Identity
Action Comics Reveals Mr Oz's Identity
Action Comics Reveals Mr Oz's Identity
Since DC kicked off Rebirth, DC has insisted that the new branding on their comics was not a "reboot." Unlike The New 52 which came before it, DC has insisted that Rebirth is a new chapter in the same story, not a new story. Your mileage may vary on how much water that claim holds or if that distinction even matters. But trying to define Rebirth by what it doesn't seem frivolous when there is so much to say about what it is.