Oh yeah this totally makes sense. McGreggor is the biggest most lucritive PPV draw the UFC has ever had or every will have very likely. Dana has probably been drooling over this possibility for a year now.
The other fight I would love to see on this card is Jon Jones and Francis Ngannou, however I know this isn't possible since Aspinal is the Interim Heavyweight Champ, so he gets 1st crack at Jones. Not sure if this will happen at 300 or later, depends if Jones is healed up yet or not.