What benefits does this provide to anyone?
Currently, the forum is full of low quality posts. The same question is being answered by 10 or more people for signature payment. These things wont probably happen in Legendary forum. People will get to see more knowledgeable, in-depth conversation and will learn a thing or two about bitcoin.
There is already the donators sub-forum which is essentially dead and I can't see a Legendaries sub-forum going any different.
I think, this will be different because lots of Legendaries are still active as opposed to donators.