MORE: Looking back: Rousey vs. Tate

And if you ask the woman who lost the title to Nunes, Miesha Tate, Rousey better be ready.

“It’s really, really hard to say, because who knows what we’re going to get out of Ronda when she comes back," Tate told “The MMA Hour.” “If we’re getting Ronda at the best that she’s ever been, then I’d say Ronda (would win the fight). But if we’re getting Ronda coming back with a half-ass mentality, kind of like ‘I just feel like I have to do this one time,’ and then she’s got a lot of ring rust and maybe she’s still punch-shy since she hasn’t fought since Holly, and we all saw that obviously Amanda has incredible power with her right hand — so if she hits Ronda with one of those, I could see it being a huge problem for Ronda. A big, big problem.”

Tate lost to Nunes by submission in the first round of their UFC 200 bout in July. Just months before, Tate took the belt from Holly Holm, who knocked out Rousey in her most recent fight at UFC 193 in November 2015. As someone who has fought and lost to Rousey twice, Tate has arguably more insight into this matchup than any other fighter.

“I really just don’t know what we’re going to get with Ronda. I know what we’re going to get with Amanda,” Tate said.

We’ll all find out Dec. 30 in Las Vegas.