Metal Allegiance, the metal supergroup featuring core members David Ellefson (Megadeth), Alex Skolnick (Testament), Mike Portnoy (The Winery Dogs, ex-Dream Theater), and Mark Menghi, along with multiple special guests, have announced some 2016 East Coast shows. Confirmed guests joining the core members include: Chuck Billy (Testament), Mark Osegueda (Death Angel), and Ron “Bumblefoot” Thal. Supporting acts include Next…