Former UFC lightweight fighter Dustin Poirier commented on a potential quadrilogy against his longtime rival, MMA superstar Conor McGregor.Poirier retired last year following a decision loss to Max Holloway at UFC 318. As for McGregor, he is returning after a five-year layoff to take on Holloway in a rematch at UFC 329 in July. Should McGregor win that fight, it will be interesting to see what the UFC does with him next.Could a fourth fight agai…