Ronda Rousey once called a potential matchup with Cris Cyborg 'the biggest MMA fight of all-time.'

Many fans agreed, but much to their disappointment, the fight never came to fruition, and still hasn't.

However, the combat sports world has proved more unpredictable than ever in the last two years.

From a Mike Tyson return to the Chris Eubank Jr-Conor Benn rivalry, as well as Jake Paul 's upcoming fight with Anthony Joshua , it seems like anything goes in today's fighting landscape, as long as the money is there.

Just this week, reports suggested Rousey was in talks with boxing's female superstar Katie Taylor to make a stunning comeback in the ring — one the latter said she was 'very open' to taking.

Even UFC champions like Tom Aspinall and Alex Pereira are constantl

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