With UFC 257 right around the corner, the promotion has dropped the pay-per-view event’s official trailer. The video, which features headliners Conor McGregor and Dustin Poirier , artistically walks fans through the two fighters’ history together from their 2014 matchup to current day. The highlight begins with the lead-up to UFC 178, which hosted their first fight won by McGregor after a whole load of trash-talking in the buildup . Related Artem Lobov: Conor McGregor will stop Dustin Poirier again in first round at UFC 257 Owen Roddy: 'Stone-cold killer' Conor McGregor will be too much for Dustin Poirier again Dustin Poirier: Conor McGregor rematch at UFC 257 isn't about 'revenge' or 'getting even' Since that time, both men have gone in separate directions. McGregor went on to win the UFC featherweight title and then the lightweight title, but vacated both without defending them because of inactivity