Conor McGregor has entered a new stratosphere of fame since taking on Floyd Mayweather in the most lucrative fight of all-time.

The Irishman was already a pay-per-view king in the world of the UFC, but his dabble in boxing grew his brand exponentially.

Now the questions is: what's next for McGregor?

Any UFC fighter within remote distance of Mystic Mac's weight would love a fight with McGregor because they know it will be the biggest payday of their career.

Conversely, if money is the 29-year-old's primary motivation, he may return to boxing and a bout with PaulieConor McGregor has decided who he wants to fight next and it would be ...[x] Malignaggi would make a lot of sense.

However, despite becoming the first dual-weight champion in UFC history, the Notorious One has never defended a title inside a UFC octagon.

He vacated his featherweight title almost immediately after defeating Eddie Alvarez for the UFC lightweight title, but having not had an MMA fight since that success one year ago, the lightweight division now has an interim champion in the form of Tony Ferguson.

El Cucuy defeated Kevin Lee for the belt at UFC 216 and with UFC 219 to be held on December 30 this year, it looks a good stage for a showdown between the two champions.

While promoting his upcoming documentary Conor McGregor: Notorious, the Crumlin-born fighter admitted negotiations for a fight with Ferguson are imminent.

“I’ve got everyone clawing at me, trying to get at me, and that’s from multiple sports, multiple organizations, multiple everything,” McGregor said. “It’s been like that for a long, long time, I feel, so it’s just another day for me. I know there are many contenders in the UFC.

"There are many boxing contenders as well. What interests me is certainly a UFC bout, certainly a defense of my lightweight title. There is a fighter [Ferguson] with the interim lightweight belt. I feel that will be next. We’ll see how negotiations go.”

McGregor already has three of the top four grossing UFC events of all-time on his CV, where would a showdown with Ferguson to prove who is the true lightweight king rank among them?