Betcha didn't see this coming ... Cris Cyborg -- who had a heated rivalry with Ronda Rousey -- says she's PUMPED to watch Ronda.
TMZ Sports saw Cris at LAX on Friday ... and asked her if she planned on watching her former foe at WM35.
"Yes, I will. I'm gonna be very excited."
That's not exactly shocking ... 'cause Cyborg's a big time wrestling fan -- but what she said next was.
"I think Ronda's doing great. She's showing girls from MMA can do it same thing.