Let's not forget that Sun more than likely has a tracking device of some sort to lead Widmore and others to the Island. Widmore may turn out to be the good guy after all. He may have been the person that could have kept the Smoke Monster in check and not fallen for the same things that Ben did. I think Widmore and other will be coming soon to join in the war.
Not related to this topic but I have to say it: Didn't Richard look like a bitch when Flock hit him and carried him off! LOL