Those are meant to be designs for Captain Marvel's (Carol and Mar-Vell) armor for the
movie. In the movies Earth bound characters like Captain
America, Black Widow, Hawkeye, and Nick Fury, wear unifoms that look like thick fabric and have pouches and zippers and straps.
Cap, Black Widow, Fury, Hawkeye, from the Avengers movie:
But because Thor and Loki and all of Asgard are not of Earth they made their clothing and armor look different. They didn't make Thor look like he was
wearing a costume like he does in the comics.
Thor and Loki from the Avengers movie:
Thor standing next to Cap and Black Widow and Hawkeye in the Avengers movie. Compare and contrast:
So, my idea is that like Thor Captain Mar-Vell is from another world that is not like ours. He is an alien soldier who wears alien looking armor. When he
dies he gives his alien Kree armor and alien Kree technology to Carol Danvers. The armor converts to her body. The armor isn't leather, its a
reddish
metal like the Warriors Three or Loki's armor that was colored and not just silver. Maybe I should have made it more red. There are alien designs and
writing on it that I drew here as squiggles because I don't know how to write in Kree.
Sorry the only image I could find is so huge.
The Warriors Three:
But also like Thor and the Warriors in the movies she has fabric under her armor:
My idea here would be to make it look more like Cap's or Black Widow's fabric uniforms to make it look more like an Earthling is using alien armor
instead of just an alien version of Iron Man.
I don't think they will make Mar-Vell's costume in the movie look like a costume, I thin it will look like armor and be more like the Ultimate version. My
thinking is that if she is an extension of Mar-Vell, she might need to look like it.
Found this image of what her uniform could look like if they went with a more Black Widow design. But I think it should look more alien.
And instead of a uniform like Black Widow's (which someone mentioned
she might look similar too and you want them all to look unique I think) I thought her wearing the armor might be cool.
Ultimate Captain Marvel's alien armor:
This was my attempt to design a look for Carol in the movies that also combines the 616 Captain Marvel costume and the Ultimate Captain Marvel
costume.