If they choose to bring Sybok back, it will almost certainly have something to do with Spock's relationship with Chapel. Which would be even more problematic, as then Chapel would know of Sybok's existence while Kirk, McCoy et. al would not.
But I don't think he's coming back. His reveal was just a big nothingburger.
But I don't think he's coming back. His reveal was just a big nothingburger.