Oh. did'nt see it that way. The McDojos are anyware, in any country in the world, and it's mostly karate that is taught in these.
I could rephrase the question: what could karate do to gain respect as a REAL, efficient combat art? I don't think personally that they could do anything, if they don't take some good things from other arts as well. It's not a very varied style (or style-s, there's hundreds of Karate styles as well)