If Joanna wins, it's going to be because she's got the talent and skill to do so (and I'm pulling for her) not because Rose was (understandably) shaken up by hooligan behavior.
Plus, we know Rose can thrive in emotionally trying situations anyway. If Paulo Costa is to be believed, she was crying uncontrollably in the back before her championship fight and we saw how it went when she was actually in the cage.
My point being, make the bet if you're confident in Joanna but don't base the decision on the psychology of the situation. How many times have people on Sherdog guaranteed a winner based on weigh in posture and eye contact and then it doesn't play out like that at all.