Among my passions are the works of J.R.R. Tolkien. As good a fantasy as is his masterwork The Lord of the Rings, it does leave itself wide open for parody, and if you give MAD Magazine an inch of an opening, they'll take a mile. Embedded here are their versions of the three parts of the Lord of the Rings films - Feebleschtick Of Ka-Ching, The Two+ Hours, and Rehash of The Thing.
And if you've really got time on your hands, here is the audiobook version of the old National Lampoon's Bored of the Rings, which came out in the late 1960's, so Tolkien might have read this.