Warner Bros. certainly wants to keep Gal Gadot happy by giving her such an enormous pay raise after just one movie. Gadot becomes an exception for high paid female actors heading their own movies, joining Brie Larson and Scarlet Johanson, who were both paid $5 million and $15 million for their roles as Captain Marvel and Black Widow,respectively.
According to IndieWire, Gal Gadot was paid $10 million for her role as Princess Diana in Wonder Woman 1984, which is, as IndieWire states it, 33 times larger than her payment in the original Wonder Woman
It also means that Warner Bros. is heavily invested in keeping Gal Gadot as Wonder Woman, which could mean her rumored involvement in The Flash could have more importance beyond Wonder Woman being in the original Flashpoint story from the comics. The pay raise could also be a means of keeping her in the mind of general audiences until her third movie comes out, which may not be for quite awhile.