Synyster Gates's dad, Brian Haner Sr., is better known as "Guitar Guy", warm-up act and musical accompaniment for Jeff Dunham, in addition to having done some work with Frank Zappa. He actually contributed to some of the albums, and plays the second solo in "Angels" on The Stage.
The Rev's first kit was a series of toy drums till the age of 13 when he got a real one.
Creator Breakdown: Before the album was produced at that. Suffice to say, when Jimmy passed away, the band was horribly devastated, working on the album without not just their drummer, but best friend. These emotions, as well as the immense shock of Jimmy's passing is what lead to arguably their darkest album, Nightmare.
Hitless Hit Album: The Stage is on its way to be this, due to the band dropping it pretty much without notice. Only the (8-minute long) title track was released as a single, a mere two weeks before the album, but even that was more of a teaser.
Lying Creator: In late 2016 the band announced a new album called Voltaic Oceans, coming out in December. The album came out in November and was actually called The Stage. It's because they wanted to surprise the fans and give away as little as possible before the album's release.
The bassist on their first album, Justin Sane, is not Anti-Flag's guitarist who uses the same stage name.
Likewise, Johnny Christ (b. Jonathan Seward) is not to be confused with John Christ (b. John Knoll), who played guitar for Samhain and Danzig in the '80s and '90s.
Mean Character, Nice Actor: The members often have a gangster/thuggish persona, but are actually very down-to-earth and friendly (Zacky Vengeance and Johnny Christ, in particular).
The Pete Best: The band's first three bassists (Matt Wendt, Justin Sane and Dameon Ash) are very often forgotten. Justin did in fact play on Sounding the Seventh Trumpet, but the band didn't gain any mainstream success until Johnny Christ joined the band. Justin had to be let go because he suffered brain damage in a suicide attempt, and M Shadows has described his post-recovery persona as "constantly on an acid trip".
Subverted by Zacky. Avenged Sevenfold were a four-man band on the original release of Sounding the Seventh Trumpet, with Zacky playing lead guitar. Syn wasn't added until the re-release (where he only played in To End the Rapture), although fans tend to assume he was always the band's lead guitarist and Zacky was always the rhythm guitarist.
Scully Box: Johnny Christ had to stand on one for the video of Nightmare.
Song-wise, "A Little Piece of Heaven" was not planned to be part of the Self-Titled Album, but persuasion from Shadows, on the condition that The Rev (who created the rough ideas for the song in the first place) would be the one to fully-supervise the production, made sure that it did.
According to this interview, the spoken part on "Exist", which closes The Stage, was initially supposed to be a recording of Carl Sagan's Pale Blue Dot speech. When that fell through, they contacted Neil Degrasse Tyson instead. M. Shadows also wanted the song to be entirely instrumental, but Gates insisted on having vocals.
Word of God: The song and video for "Bat Country" are both confirm to be based on Fear and Loathing in Las Vegas. This should be obvious to anyone who's seen the movie or read the book, even if the title of the song didn't give it away.