As far as I'm concerned, this is a one time event. After all, the threads remain open for those who wish to post on past discussions. And since people are anticipating CbC discussions of
The Hobbit and the
Silmarillion (perhaps even other works), it will take years to get back to the LotR. We (or whoever is still around then) will cross that bridge when the time comes - or may even have to build the bridge first!
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'Mercy!' cried Gandalf. 'If the giving of information is to be the cure of your inquisitiveness, I shall spend all the rest of my days in answering you. What more do you want to know?' 'The whole history of Middle-earth..
.'