At this time, Gunn has not announced unveiled his plans for Wonder Woman besides a prequel series set on Themyscira before the birth of Diana Prince.

Source: https://www.cbr.com/wonder-woman-lynda-carter-cosplay/

The fate of Wonder Woman is still largely unknown, and some fans have apparently wondered if Ana de Armas could be the new Diana Prince.

Source: https://www.cinemablend.com/superheroes/ana-de-armas-gets-asked-if-she-could-take-over-as-wonder-woman-after-patty-jenkins-third-movie-was-scrapped

Unfortunately Patty Jenkins' developing threequel was scrapped by the studio, so it's unclear exactly when Diana Prince will get another solo adventure.

Source: https://www.cinemablend.com/superheroes/flash/gal-gadots-flash-cameo-was-revealed-by-ben-affleck-but-is-it-still-happening