I don't think this will be the offical costume. It looks like a costume test photo, which the WB most likely released to see what people's reactions are.
From what I've read, most the reactions are negative. So I do think there will be another costume. This isn't uncommon. Spider-Man costume went through several prototypes.
Look at Supergirl. Originally she was going to look like this in the movie.
But then they changed it to this.