#2. Francis Ngannou vs. Jon Jones - UFC heavyweight division

UFC heavyweight champion Francis Ngannou still has some way to go before he is ready for a return to action. He would also have to re-sign with the promotion to get back in the Octagon. Despite that, a return fight against Jon Jones, one of the greatest of all-time, should be a fight Dana White already has his eyes on.
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Jones’s long-awaited move up to heavyweight finally seems close to coming to fruition, and there has been some talk of an interim title fight between him and Stipe Miocic. While that fight would be huge, if Jones were to win, the bout between him and Ngannou would likely be even bigger.
The fight with Miocic seems, at least on paper, one of the better match-ups for Jones in the heavyweight division. It could prove to be a good way of introducing him to life at heavyweight and potentially set up a truly monumental clash between him and Ngannou.
#1. Conor McGregor vs. Jorge Masvidal - UFC welterweight division

Conor McGregor and Jorge Masvidal have been among the top three most popular fighters in the UFC for several years now. It therefore seems a little odd that there has not been significant speculation about a potential scrap between these two superstars. Right now seems like the perfect opportunity to target this fight.
McGregor has been out injured following the broken leg he suffered in his most recent bout against Dustin Poirier; however, his return to action does seem to be inching closer. Masvidal recently lost to friend-turned-rival, Colby Covington, and is now in need of a new dance partner.
With both men suffering losses recently, the UFC would be smart to book this fight now, as it would be less intriguing if either man were to suffer further defeats. If they were to schedule it today, it could potentially be one of the biggest fights in the company’s history.