Dave Mustaine was the original lead guitarist for Metallica, but was fired in 1983 after a series of alcohol-fuelled clashes with his bandmates.
Now it's been revealed that a secret pact between the members will go into force this year, on the 30th anniversary of Mustaine's original dismissal.
According to a source close to the band who was not able to reveal their identify, the remaining Metallica members made a drunken offer to Mustaine after his departure. Decades later, Mustaine has stuck to his part of the deal.
"What happened is, Dave [Mustaine] begged to be back in the band after being fired for the final time," said our source. "They said he could join Metallica again if he quit all drink and drugs, found God, became a conspiracy theorist and accused the President of killing innocent civilians, with extra points for every other crazy story he could get in the press."
"Suffice to say, he was patient and pulled it off like a pro. Now Metallica has to stick to their part of the deal, so it's happening this summer. And after all, he can't be as bad as Lou Reed."
Metallica are expected to announce the Mustaine shows in the coming week. Kirk Hammet is said to be pretty pissed about the whole affair.
Would you see Metallica with Dave Mustaine? Let us know what you think in the comments.