Metal Allegiance, the supergroup featuring core members Alex Skolnick (Testament), Mike Portnoy (Dream Theater), David Ellefson (ex-Megadeth), and Mark Menghi, will be performing at the House Of Blues in Anaheim, CA on January 28. The show will find the band joined by Fredrick Akesson (Opeth), Bobby Blitz (Overkill), John Bush (Armored Saint, ex-Anthrax), Marty Friedman…