No plans for final Big Four shows before Slayer retirement

It's not sounding good for any last Big Four shows before Slayer retire according to an interview conducted with Metallica bassist Rob Trujillo on Australia's "The Music" podcast:

"To be honest, I haven't heard any conversations about the 'Big Four,'" Robert responded. "We love SLAYER — I love SLAYER; they're one of my favorite bands. And ANTHRAX is amazing. And that was great what we did a few years back. But I haven't heard any conversations about that. I mean, obviously, we're still in the middle of our tour. And I'm not sure what [the other bands] are doing. I know, yeah, SLAYER is definitely on their final tour. I'm not even sure SLAYER's up for that or what."  

He continued: "It's a weird question, because it hasn't been talked about or discussed, because everybody is kind of in the middle of their stuff right now. So I don't even know how to answer that. But I can say it was an incredible experience, and we all had a blast. And it was something that no one thought could really be done, and then it happened. And it was a beautiful thing. But, you know, I think at some point, everybody kind of moves on and they get wrapped up in their stuff, and that's kind of where everybody's at right now."