UFC 207 Cheat Sheet: Amanda Nunes vs. Ronda Rousey

— -- It has been a wild year in mixed martial arts -- and it's almost fitting that the UFC would close it out with the return of Ronda Rousey. You might say 2016 left us with more questions than answers about this sport. Heading into UFC 207 on Friday, the same can be said about Rousey: More questions than answers. How will she look after more than a year off, in her first appearance since the loss to Holly Holm? And even if she's at her peak, will it be enough to topple defending champion Amanda Nunes?

Questions surround the entire main card at UFC 207. Can Dominick Cruz put a cap on one of the greatest comeback years in the sport's history against Cody Garbrandt? And will TJ Dillashaw or John Lineker be waiting in the wings for the winner?

ESPN.com is here to tell you everything you need to know heading into the final pay-per-view event of the year, with its newest edition of UFC Cheat Sheets, including Cruz-Garbrandt,? Dillashaw-Lineker?and Johny Hendricks-Neil Magny.

Amanda Nunes (13-4) vs. Ronda Rousey (12-1), bantamweight championship

Odds as of Dec. 29: Nunes 120; Rousey -130

The Rousey mystery