Lord of the Rings
is just one of many influences on Babylon 5. I would bet that Joe has read and watched more stories than a majority of the audience watching the show. There's a lot more to discover than Tolkien in there. Even in B5's original conception notes (http://www.cafepress.com/b5books/6587738
) he also mentions Foundation, Lensman, Dune
, as well as several movies.