This seems to be the summer of Avenged Sevenfold. Not only are they headlining this summer's Mayhem Fest, they will be releasing a mobile game called Hail to the King: Deathbat at some point this summer, which actually looks like a Diablo III-type RPG from the one screenshot floating around of it (above).
In an interview with Revolver, vocalist for the group M. Shadows talked about how the game came to be, each one of their characters, how they totally did all the voiceover work drunk and how they incorporate their late drummer The Rev into the game. It sounds like a really ice tribute on top of what should be a cool game!
"Well, for instance, Arin [Ilejay, drums] really wanted a blade in each hand with a boomerang effect so that they would come back to him. We couldn’t do that, so we compromised and gave him a double-sided sword. Zacky [Vengeance,guitar] wanted a baseball bat—he throws rocks at people, and mashes them with a bat. Synyster Gates [guitar] has a little demon that runs around with him—and when you use his magic powers, you hear one of his dive-bombs, which he recorded specially for it. Johnny [Christ, bass] has the 'Hell Sword,' which rains blood on people, and I have 'Shadows Sight,' which is like a black plume of smoke that you inhale in your lungs. We all did stupid voiceovers for it when we were a little inebriated. [Laughs] Also, with the blessing of his parents, we put The Rev in the game. Once you unlock his character, you can use him as your comrade to help you through the levels."
The game follows the band’s Deathbat mascot as he reclaims the underworld from the evil Dark Andronikos. Here's a screenshot of the game: