I am unsure what I should do about my hair for this costume. Wonder Woman's hair is long, black, and wavy or curly. Mine is only one of the three (long). The front of mine is currently neon pink and the back is the natural dark brown. It's also stick-straight and won't hold a curl. These complications strongly suggest wearing a wig, but I find them somewhat uncomfortable, and I think a wig with a tiara is going to be even worse.
I've already broken tradition by adding straps and a skirt, so not being accurate isn't really much of an issue.
When it came time to select a pattern for my costume, I needed something that was tightly fitted to either the waist or the hips, with a sweetheart neckline. Traditionally, Wonder Woman's belt is at her waist, but since my costume will be extending much further (since I will be swapping out panties for a skirt), I don't want to OD on blue with white stars. Fitted to the hips sounds better to me.
I have been unable to find a dress that fits those criteria, so I have decided to adapt a corset pattern. Butterick 5797 (view D) is my choice, and it shouldn't be too difficult to add a skirt to it. I don't have a skirt pattern picked out, but it shouldn't be too hard to steal one from a another pattern or draft one myself.