Much as I'd love to see Carol Danvers onscreen, I'm not sure I'd feel the same about Dushku as a blonde. Although I guess comics characters haven't always kept their hair color when translated to live action (e.g. redheaded Noel Neill as Lois Lane, raven-haired Kristin Kreuk as Lana Lang, or brunette John Wesley Shipp as Barry Allen).
Also, Ms./Captain Marvel is a Superman-level character power-wise, so it'd be hard to do her justice on a TV budget, and I wouldn't want to see her powers toned down. I'm hoping she'll show up in the movies, but I'm pretty sure a SHIELD
TV series would deliberately focus on more normal, human characters. (Which is why I'm thinking Mockingbird for the female lead.)