At the rate things are going - I'm sure we're going to see them change the gender of some characters because... I've got no good reason to do it so ...just because.

yeah, but look at Wonder Woman, she's been around about as long as Batman and Superman.
she's part of the DC trinity.
but in nearly 80 years she's never been seen on the big screen, while Batman and Superman have at least 20 movies between them.

and when you look at the whole comic book movie genre, specifically superhero movies, there's hardly any female led movies.

off the top of my head, the only ones i can think of are Supergirl, Elektra and Catwoman.
there are teams with female members, but other than those listed i can't think of any other movies about solo heroes that are women.

still at least Wonder Woman got a TV series once.
more than most female superheroes can claim.

just a shame the young Diana series never got anywhere, young Bruce and Clark both got their own series, i was looking forward to young Diana's adventures.