With former Metallica members Dave Mustaine and  both on Gigantour this summer, there has been rampant speculation the two would jam an old-school Metallica song from the band's Mustaine era.

In an interview a few weeks ago, Newsted told SkullNBones that he and Mustaine have talked about playing some vintage Metallica songs together. “There is a chance that Mustaine and I will bust out some old Metallica that he was a part of,” Newsted said. “I’m willing to throw down ‘Phantom Lord.’ Actually, whatever he calls out, I’m gonna throw down.”

Now Mustaine has all but confirmed the collaboration by asking fans for suggestions as to which Metallica song the two musicians should perform together:

Here's a suggestions for Mustaine and Newsted: Instead of just picking one old Metallica song, how about working up a few of them and rotating them throughout the tour?

The 2013 version of Gigantour features Megadeth, DeviceHellyeahDeath Division and Newsted. It kicks off July 3 in Gilford, New Hampshire and winds across the continent before wrapping up in Toronto on Aug. 11. Click below for dates.