There's no question that Ronda Rousey's toughest opponent on the horizon would be Cristiane "Cyborg" Justino. But there is a question as to whether the former Strikeforce women's featherweight champion would be able to make the 135-pound limit to challenge for Rousey's UFC women's bantamweight title.

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But Invicta Fighting Championships president Shannon Knapp believes the weight-cut won't be an issue for Justino, the promotion's current featherweight champion, as she is slated to make her bantamweight debut at Invicta FC 10 in December.

"Everything seems to be on schedule," Knapp told Sherdog.com. "She is pumped up and ready; she is making her way. She wants that fight with Ronda. She is putting in the hard work, the time and the effort to get that fight. I think she's very focused on getting to where she needs to be and where she needs to go to have that matchup."

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Justino has struggled in her previous attempts to cut to 135 pounds, but it appears she isn't having any problems this time around. She took to her Instagram to show how well she's doing so far with the caption, "Starting to realize I am going to need a new bikini sponsor when I make 135lbs."

Her opponent in December has yet to be determined, but it's safe to say that a win for "Cyborg" would likely lead to a showdown with Rousey in 2015.

"Provided that she does make that weight -- if we can get that matchup between her and Ronda, this is going to be a fight that people are not going to forget," Knapp said. "If you ask me, this is the biggest female fight there is out there and will be out there for years to come."