Steve Vai, Zakk Wylde (Ozzy Osbourne, Black Label Society), Yngwie Malmsteen, Nuno Bettencourt (Extreme), and Tosin Abasi (Animals As Leaders) have announced dates for a second Generation Axe tour. Bassist Pete Griffin (Giraffe Tongue Orchestra, etc.), keyboardist Nick Marionovich (Yngwie Malmsteen), and drummer JP Bouvet will also take part in the trek. Vai said the…