MEGADETH mainman Dave Mustaine has revealed via his Twitter account that there are some major tour announcements forthcoming: "A huge announcement is coming for next summer in the States and in Europe and the UK. Just went through a couple weeks of hell arranging something special for summer. Stay tuned! We're going to have some Big shows coming up."

Take note of the word "Big" - alluding to the possibility that the aforementioned territories could see The Big Four of thrash metal - METALLICA, SLAYER, ANTHRAX and Megadeth - back on the road.

Nothing has been officially confirmed - stay tuned to BraveWords.com for more details.

The Big Four: Live From Sofia, Bulgaria DVD and Blu-ray containing footage of the June 22, 2010 Sonisphere cinecast from the Sofia, Bulgaria leg of the touring rock festival featuring the Big Four of 1980s thrash metal - Metallica, Slayer, Megadeth and Anthrax - is out now. A video unveiling the packaging for the set is available below:

In addition to the two-DVD set and the corresponding Blu-ray, there is a limited-edition "super deluxe" box set including the DVD set, five CDs with ALL the music, a 24-page booklet, a poster, photos of each band, and a Big Four guitar pick.

The deluxe set can be pre-ordered in the official Metallica Store and the Universal Store UK, all orders from the official Metallica store will include a limited edition RED Big 4 guitar pick with one of four different print colors (white, black, silver or gold - see below), not available in stores.

The tracklistings:

Anthrax:

'Caught In A Mosh'

'Got the Time'

'Madhouse'

'Be All, End All'

'Antisocial'

'Indians'/'Heaven And Hell'

'Medusa'

'Only'

'Metal Thrashing Mad'

'I Am The Law'

Megadeth:

'Holy Wars... The Punishment Due'

'Hangar 18'

'Wake Up Dead'

'Head Crusher'

'In My Darkest Hour'

'Skin O' My Teeth'

'A Tout Le Monde'

'Hook In Mouth'

'Trust'

'Sweating Bullets'

'Symphony Of Destruction'

'Peace Sells'/'Holy Wars Reprise'

Slayer:

'World Painted Blood'

'Jihad'

'War Ensemble'

'Hate Worldwide'

'Seasons In The Abyss'

'Angel of Death'

'Beauty Through Order'

'Disciple'

'Mandatory Suicide'

'Chemical Warfare'

'South of Heaven'

'Raining Blood'

Metallica:

'Creeping Death'

'For Whom The Bell Tolls'

'Fuel'

'Harvester Of Sorrow'

'Fade To Black'

'That Was Just Your Life'

'Cyanide'

'Sad But True'

'Welcome Home (Sanitarium)'

'All Nightmare Long'

'One'

'Master Of Puppets'

'Blackened'

'Nothing Else Matters'

'Enter Sandman'

Encore:

'Am I Evil?' (with the Big Four)

'Hit The Lights'

'Seek and Destroy'