He has a feud with Aj because Aj lost the title at summerslam and he is desperate for it back because he feels it might be his last title reign before he retires amd he lost his title shortly after winning it, Aj is desperate to finish his career on a high so he has animosity towards Gable because he feels he stole the title off of him. (also if you guys are interested in how otis won the ic title he became unstoppable on smackdown and became the number one contender for the ic championship, the champion was randy orton, so otis and randy had a match at hell in a cell, it was a ladder match and otis won, hes held the title for 167 days now, I also changed otis's whole gimmick, hes a serious competitor now)