During an interview with Songfacts, Megadeth’s Dave Mustaine talked about a possible ”further” The Big 4.
Dave said:
“I really think it’s time for the guys in Metallica to step up and us do one last round, see if we can get Slayer to come out of retirement and do a ”Big Four” passing of the torch to the new ”Big Four”. It would remain to be seen who they are.
“I think it would be really cool symbolically if we did something at, like, the L.A. Coliseum, even if it’s one show and that’s it,” he continued.
“Slayer is from Los Angeles, so it would probably make it more convenient for them to go home at night.”