Yeah. TES has such great lore already, why ruin litter it with LOTR material? Most likely such content would be restricted to the mainstream Tolkien stuff, meaning whatever showed up in the movies...
You misunderstand- This is more like a total conversion, gets rids of Skyrim and replaces it with Middle Earth.
The movies were blasphemous (though entertaining)... These guys are basing the mod on the books, and my investigations proved they know what they're doing.