If Poirier wins, Conor will demand an immediate rematch (actually a rubber match), which Poirier will obviously agree to because it is much more lucrative than fighting Gaethje or Oliveira for the vacant belt.I think both Oliviera & Gaethje are going to wait & see what happens in the Poirier/Conor fight. If Poirier wins they will both call him out & 1 of them will get to fight Poirier for the vacant belt.
It is quite likely that Conor and Poirier will be fighting for the vacant belt on January 23. Dana is meeting with Khabib in Abu Dhabi that week. Expect Khabib to double down on his retirement. In response, Dana will use the press conference during fight week to announce that Conor and Poirier will be fighting for the belt. Dana will figure that the way to draw Khabib out of retirement is Conor having his belt. Conor holding the belt would make a Conor-Khabib rematch do at least 3 million PPV buys.