Rob Halford comes out for Rapid Fire (which they did as the grand finale on the very last days of the black album tour)
King Diamond (though please play the Mercyful Fate songs in full, just this once).
and here's a darkhorse ensemble
Paul Di'anno for Remember Tommorrow and Prowler.
He's like "yo give me yo insurance information!" and I'm like "I didn't hit you with no car, I hit you with this mack truck I call a fist!"