With Sean “Diddy” Combs facing accusations of physical violence, sexual abuse, and sex trafficking, the music mogul is reportedly out for revenge. A bombshell report claims the Bad Boy Records founder has been secretly getting ready to come for the A-listers who have deserted him, RadarOnline.com has learned. “He’s nursing a grudge against collaborators who’ve gone silent amid his legal battles,” a source squealed to The National Enquirer. “Questions linger over the whereabouts of stars he helped elevate, like Jennifer Lopez, Usher, and Justin Bieber, who have distanced themselves from him.” I…