Now that their rivalry has been settled with an epic 'Tonight Show' drum battle, Will Ferrell and Chad Smith are ready to team up and take on a new opponent: Metallica's Lars Ulrich.

Ferrell dropped the new challenge in an interview with SPIN, saying, "We did talk about another drum-off. With a third person that looks eerily similar to Chad and I. A third drummer out there." With a little prodding from Smith, he continued, "We talked about Lars, from Metallica. So, I don't know. ... Lars gets pissed because he gets mistaken for both me and Chad Smith. He can settle that score now, too."

"There it is," added Smith. "The gauntlet is down."

While we wait for Ulrich to respond, ABC News Radio reminds us that the original drum battle was for charity -- and reports that specially screened and autographed cymbals ($1,000) and drum heads ($500) are still for sale, with proceeds going to the non-profits designated by Ferrell and Smith. For more information, visit the Red Hot Chili Peppers' Facebook page.

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