It has to be doesn't it? If you've got the three key members of the Justice League in your film and you're flat out saying Gal Gadot WILL be Wonder Woman, rather than saying she isn't for a secret reveal plot twist in the film, then, by the end of this movie we have to be seeing the beginnings of the Justice League?
That said, I don't know anything about the script other than Superman's in the movie and an older, more experienced and battle weary Batman will show up at some point. There's a football match. There may be a fight between Bats and Supes and, I'm guessing, Wonder Woman may be the peacemaker... so Batman and Superman can maintain a healthy dislike but mutual respect for each other.
I'm not going into detail with what I think the story will be beyond what I've said. I've had people write whole essays in my comments on what they think the plot to an upcoming film will be only to be totally wrong. I don't want to be like that. I'm just throwing the idea out there. Man of Steel 2 is most likely a Justice League origin story (call it a 'World's Finest' origin if you like).
Having written my thoughts on why Wonder Woman doesn't need an origin movie and my thoughts on Ben's casting as Batman, here are my thoughts on Gal being cast as Wonder Woman...
Meh... and I mean that as positively as I can.
Honestly, I've never seen her act in anything. Her most high profile work seems to be the Fast and the Furious Franchise, none of which I've seen beyond trailers.
She looks the part and her real life background in the Israeli Military will no doubt be an asset to the role. Some people say she's too skinny but it's really not about that. It's all about whether she can project confidence and an attitude that says 'I'm very approachable but don't mess with me.'
From the few clips of Gal in Fast and the Furious trailers I've seen she seems like she'll have the 'don't mess with me' part down. Whether she can do 'classy and approachable' as well will be the challenge.
I have no preference for any of the names put forward for the Wonder Woman role so I'm not disappointed by Gal's casting.
Perhaps the only observation that's keeping me interested in Man of Steel 2 at the moment is that the general mood by fans following the film's development is one of increasing doubt that they're not watching a train wreck happening before their eyes in slow motion.
I'm still optimistic though. Almost everyone had their doubts about Marvel's strategy for building to an Avengers movie. I remember when the idea of a Thor solo movie sounded like the most ridiculous idea ever to a lot of people - even I had my doubts on that one - yet Thor's doing better than both Hulk solo films which you would think would have been box office gold.
Maybe WB, DC and Zack Snyder have a different strategy that will equally pay off in the end?
People have been shouting out for WB to 'just do a Wonder Woman film already!' after so many years of false starts and fumbling around.
Now you've got a movie with a fairly successful Superman, the new Batman and Wonder Woman in it... tell me, if you're a fan of Superhero movies, that you're not at least interested in going to see it.
I'll be seeing it.