The group – guitarist Jerry Cantrell, bassist Mike Inez and drummer Sean Kinney – has a 25-date Euro tour planned this summer, with William DuVall of Los Angeles band Comes With The Fall on vocal duties.

“However, William will not be taking on this key role alone,” the band said in a post on its official Web site. “While we can’t name names, let’s just say that some European fans are in for some very special treats.”

The Euro itinerary comprises mostly festivals, including several with Guns N’ Roses and Metallica.

Dates have not been announced for North America, but a Stateside club trek is to kick off May 18, according to The group hinted that every city on the tour “has its own major league baseball team.”

Alice In Chains played a tsunami benefit show last year with guest vocalists including Tool‘s Maynard James Keenan, Heart‘s Ann Wilson, Puddle of Mudd‘s Wes Scantlin, and former Damageplan vocalist Patrick Lachman.

In March, Cantrell, Inez and Kinney performed with ex-Pantera frontman Phil Anselmo during a VH1 Decades Rock Live tribute to Heart.

Despite its success in the early ’90s, Alice In Chains toured rarely in the years following 1994’s Jar Of Flies EP. The band’s last road trip was an opening stint for KISS in 1996.

Staley died of a drug overdose in April 2002.