Phil Anselmo revealed in a recent interview with Drew Stone of The New York Hardcore Chronicles Live! that he's been working on music in his brand new studio. Anselmo said that if he does end up making more metal music in the studio, he's going to make it "old school" with some very Rob Halford-esque vocals.
"I just pretty much had a new studio installed next door, and we're working all kind of bugs out and whatnot. So I tell my guy, my engineer, I tell him, I said, 'Just program some drums, man. Give me some drums. Give me a different drum beat every day — up beat, down beat, whatever. Give me something.' So I'll walk in, there's a drumbeat, and I'll just pick up any instrument and just go right off the cuff. And it is some of the worst music you can imagine.
"I don't know, man. I'm this close, man — I'm this close. I'm feeling something. We'll see what it is. I've got a couple of options. I just don't know, man. If it's gonna be metal, I wanna do it old school, man. I've been kind of feeling more Halford lately, man, vocal-wise, just singing, using my range again. So, we'll see. It's gotta be right."
Given Anselmo's performances on a lot of the old Pantera stuff and even his recent En Minor project, it's probably safe to say that he could easily do it.