This is probably what he's talking about. I don't believe Rob is back with the band without something legit saying so.
BYZANTINE, ATTACKER, Ex-ANTHRAX Guitarist Confirmed For BROOKLYN METALFEST - Apr. 7, 2007
BYZANTINE, ATTACKER and former ANTHRAX guitarist Rob Caggiano have been confirmed for the second annual Brooklyn Metalfest, set to take place Friday, June 22 and Saturday, June 23 at the Hook in Brooklyn, New York. The first band will hit the stage at 7:00 p.m. on Friday and at 12 noon on Saturday. Admission will be $15 dollars for single-day tickets and $20 for two-day passes. There will also be a free BBQ for all paid admissions (free food only). Other bands that are scheduled to appear include former MANOWAR/DICTATORS guitarist Ross The Boss, SEVEN WITCHES, BRAND NEW SIN, MAGUS BEAST, CONSTRICTED, ZANDELLE, OVERLORDE, SKULLSHIFTER, VICTIM OF PAIN, TWILIGHT ODYSSEY, BORGO PASS, DEVILS ISLAND, CASTROFATE, ILLUSION OF FATE, DISBELIEVER, CHICAGO TYPEWRITER, AUDIBLE THOUGHT and ELOQUOR.