With Cap, his story started in the 40s. That's the comic history. Wonder Woman kind of has the same story when she leaves the island. She doesn't know of the outside world really. They can tweak the costume. There is one that looks more like a warrior outfit that could work. Just have the island similar to asgard. She gets her weapons and suit before leaving the island. It could work. Superman is very dated but that make that work. They removed the underwear for the new movie. I like the character and want her in the movie and she will be.