Pena shocked the MMA world in December, using her otherworldly physical and mental toughness to dethrone the suddenly mortal Nunes. It was the champion's first setback since 2014 following a legendary run that cemented her status as the greatest women's fighter in MMA history.
Will Pena prove it was no fluke and solidify herself as the bantamweight overlord? Or will Nunes reclaim her place atop the mountain?
Also on the card, Moreno faces Kara-France with the interim flyweight title on the line, and heavyweights Derrick Lewis and Sergei Pavlovich are set to exchange heavy artillery.