Good lord, this looks great. I also got Xena vibes from it, but I fail to see how that's a bad thing. Xena is one of the most badass women in TV/film history, so it's a pretty big compliment IMO.
Also, you can see Said Taghmaoui in the scene with Diana/Steve wearing the same clothes he wore in the Instagram shot. I honestly think he's just a made-for-film character and soldier friend of Steve's (or maybe Phil Darnell if they were going for comic accuracy-ish).
That scene stood out to me too, I don't know what it is.