If we're talking even something as drastic as "frozen time events" (like in Chrono Trigger after the big climax), I'd reach out and rescue Broxigar and drop him off on the Echo Isles just days before the raid on Orgrimmar. Can you imagine the shock of having him walk in just after you've brought Garrosh to a point that he'd call enough reinforcements to force the heroes in a losing battle?