A recast may be inevitable , but at this point, I see no need to rush in recasting and rebooting the character.
In other words, leave the character off the canvas for a few years , which is likely to happen anyway I suspect.
There's no point in trying to rush a recast of Diana for the sake of having a new Wonder Woman for the new DCU, right now, at least.
Presuming the new tv series is based on a Paradise Island for the new continuity , focus on building up that version of Paradise Island and it's mythos first.
Then , they can eventually introduce their version of Wonder Woman with a new actress.
But ,I just don't see a need for them rush the casting of a new WW the way they have to get in gear to start casting a new Superman.