Hmmm... Chris Broderick? Okay... I'm not sure how his style fits into Megadeth... I think he's really a much more technical player but his work leaves me cold... also find his material pretty standard fare, other than the outstanding technical prowess.
I always thought Megadeth sounded best with soulful, unique leads - Chris Poland, Marty Friedman, Al Pitrelli and even Glen Drover did it.
I guess Broderick Sir will have quite a bit to cover...