A lot of little continuity homages which was great, I only saw LotR once and have no idea about D&D and I still enjoyed the story.
I find it weird to see people talking about LotR as something to be seen rather than something to be read. To me, the films are just a fairly impressive adaptation of something whose true form is in prose. And odd to see other people suggesting that an LotR parody is somehow dated because the movies came out a few years ago. The books have been around for decades and are as popular now as they've ever been.