Cast Who:
Naomie Harris
Moneypenny's (Skyfall) personality, Calypso's (Pirates of the Carribean) attitude, Ninja Assassin sidekick girl's accent, character arc a mix of all three. Beautiful talented marketable and yet very affordable up and coming actress. Zoe Saldana and Rosario Dawson are already cast in the MCU. Naomie's the best choice. If Scandal ends Kerry Washington could do a bang-up job too.
Which name:
Spectrum
It's uniquely hers, the most accurate to her powerset, and it's her current comics codename.
Which hairstyle
That's a dumb question for a superhero. What facial hair for Tony Stark? What about, y'know... her costume!?
Which Look/Costume
Current white and black high-contrast costume with the short curly twisty things is my preference. They also may want to consider doing something new if they tie her in with Mar-Vell and sort of skip around Carol (not likely).
Other Notes:
Supporting Cast:
Derek Freeman, CIA Love Interest #1
Patsy Walker, Personal Trainer/Roommate
Marcus Daniels/Blackout, Deadly energy consuming monster chasing her
Frank and Maria Rambeau, Parents, Comic Relief
Andre LeClare, Conflicted scientist, Love Interest #2
Erneto Ramirez, Caribbean Dictator, Mastermind villain with extradimensional energy stuffs that can take out any target, trafficks people to make it happen
Sub Genre: Cop/Detective/Police Drama with Silver Age-y Superhero stylings
Also, I need to see something like this at some point: