Yeah, Black Widow clearly doesn't have any of those powers in the films. She and Hawkeye are clearly peak human while Cap is clearly enhanced.
You really need to talk about the characters which should appear in her film first though. Like who is her antoganist? Which of her origins is the best to adapt?
Madame Hydra would be an interesting one. You could save Baron von Strucker for the Shield movie. If they could get Angelina Jolie for Madame Hydra...oh my god way. Angelina and Scarlett in a movie together would be so kick ass.
I think Hyrda, in its entirety should be saved for Captain America. They are, in movie terms, Captain America villains, and seeing their evolution as his antagonists would be more rewarding than passing them around.
I think, since we met her infiltrating a company, making AIM (ostensibly a private corporation at first) and
MODOK specifically her antagonist could be interesting. You could tie together MODOK, and his creation with possibly Pym, or whatever Edgar Wright does that can be used in the modern day, and just... keep going with it. Could be cool. Especially if George Tarleton (MODOK pre-MODOK) had a hand in her conditioning.
Based on her lines in the film, I believe they went with the second origin for her, where she was trained as an agent from pre-puberty. Obviously, her husband/failed/thought dead Super soldier, the
Red Guardian (probably on that aggressive stuff Blonsky was on). He'll double as an assisting antagonist and the love interest. Plenty of AIM mooks. I think including
Super Adaptoid might be a good movie too, perhaps as the 'big invention', a robot that copies moves, with enough nanobots to perhaps copy devices and weapons as well. Could be interesting.
If she's infiltrating AIM, then other AIM characters, some sympathetic and some not so much should be involved.
Monica Rappacini could be a great CEO character, or just stick with
George Clinton. Somewhere in my head I see them experimenting on children and teenagers, perhaps young versions of
Spider-Woman,
Lifeform and
Protcyde are being held in detention cells, which might be an interesting way to get at Black Widow's maternal side as she tries to get these kids with powers out, which she identifies with from her childhood in training, while still completing her mission.
Another fun twist might be that AIM has to steal something from SHIELD, perhaps an old Hydra Canister of Cosmic Cube energy in order to power Super Adaptoid, and Natasha has to help to keep her cover, and then cover that she has easy access to SHIELD anyway, as well as fight
Maria Hill and maybe even
Hawkeye. Could be fun.
Basically, instead of trying to create some sort of normal life for her, make all the people in her intelligence life interesting and part of her emotional life.