The direction they are going based on the renderings seems very Shelby like. I think they'll try to get as close as possible. I've purchased KB parts in the past and they're always the highest quality. I'm betting they will have one kickin car.
I found some renderings of the 2005 Kenny Brown Mustang.
Looks awsome, and probably the best I've seen yet.
Found this and a few more at: http://www.gotmustang.com
pretty slick.