Though John Carmack offered to speak at QuakeCon in spite of his departure from id Software, it turns out the id co-founder will not be speaking at this year's installment in the gaming gathering. It seems logical that the lawsuit over his work between id Software parent Zenimax and his new employer Oculus VR factors into it, but whatever the reason, Mr. Carmack tweeted the following explanation: "Since the question keeps getting asked -- no, I am not going to be at Quakecon this year. My 2.5 hr talk at SMU should still be released."