Supergirl: Woman of Tomorrow is one of the first ten film and TV projects to be produced by recently created Warner Bros DC Studios under the artistic vision of James Gunn and Peter Safran. The Supergirl movie will be based on the 2021 and 2022 comics of the same title and doesn't have a definitive cast or release date yet. But casting for the DCU is in progress and fans might meet the new Kara Zor-El as early as July 2025 with the release of Superman: Legacy, which will be the first movie of the rebooted universe's Chapter 1: Gods and Monsters.
Source:https://www.cbr.com/actor-shortlist-who-could-play-dcu-supergirl-woman-of-tomorrow/