Pereira just headlined the biggest card of the year dude, he doesn't need any more of a push. I could see Bo Nickal on the card.
Pereira's already a draw and Conor's numbers aren't going to substantially increase by having him there. It would be throwing money away to not have another big card with Pereira headlining.
Conor hasnt been on the same card with a champion in 8 years for the same reason they never considered him for 300. They don't want to have to give up PPV points to anyone else for those 1.5 million buys he does.