Well, it won't be that simple. I think they survived on under another name, at least for a while. It's highly unlikely that you can just wipe out the order and all traces of it just like that. Like what somebody said in the Da Vinci Code topic, it was no coincidence that not long after condemning the Templars as heretics, the Pope Clement V and King Philip IV, who respectively condemned them and took their wealth, died in the same year.

Organisations this powerful don't just disappear. Think of the Nazis, who remained quite powerful after 1945, apparently pretty much controlling some South American country, but not in name of course. The Neo-Nazis are still here today. Just one destruction doesn't mean they disappear forever. Think of the KKK as well, which have disbanded a few times in history, only to reappear.