Why do you need to reboot Wonder Woman to reboot Donna Troy?
I mean Wonder Woman current story (after Rebirth) almost not include Donna Troy. Her connection with Donna is told only in Titans.
Also, I don't think many fans of Wonder Woman will oppose that Wonder Woman current story with Donna (Wonder Woman erasing the memories of Donna, so she wouldn't be a danger) is retconned.
In my opinion, DC should reintroduce Donna without her confusing past (maybe a younger version). That would be useful for the character.