I would like to see new high rank added. Now there are so many Legendary members on Bitcointalk that this rank aren't exclusive anymore. And there are some users who are contributing here for long and maybe they deserved to reach special rank.
But no, not Satoshi. First of all, because only one person can be called Satoshi. Secondly, because this name aren't related to current ranks in any way. Maybe we could call them "Extraordinary" or sth similar?
On most of the websites that offer points or ranks for posts, there is requirement like getting certain number of posts per year maintain rank. This is better solution than just adding one rank above legendary in my opinion.
I think better option is releasing new measurement, we can call it like Advantage point (only named suddenly, we can choose more appropriate name for it). The new one will allow new users fight with older users (mostly higher ranked users) in campaigns. My ideas come from the question "Why more constructive newly, lower-ranked users can not be as competitive as older, higher-ranked users; or more competitive than older, higher-ranked users. I believe they deserve the right if they are really constructive. There are lots of higher-ranked users only ranked up and stayed at their current ranks by luckiness before merit system launched. We should have something new to help newly, lower-ranked users take advantage in the forum and, by the way, give them motivations to keep contributing.