If they both come in fully healthy, then Wlod will win. He can legitimately hang with some top cruisers, Green can't.
Wlodarczyk, although crude and performing a bit worse lately (probably due to personal problems), at least was legitimate top fighter at CW. He is simply better and also about his prime, while Green is almost 40. I like Green, but I do not really understand how one win over shot RJJ elevated him to the top, and why is he still there after Tarver showed his limitations. The only problem I can see is his (Wlod's) style - he often tries to land one big punch to finish a fight, and in case it doesn't happen he may be in trouble, especially if he fights in Australia (not that I am suggesting boxing is more corrupt there than anywhere else).
I don't think there would be any robberies. If Wlod does enough to win, he will get the decision. Sure, Green would probably get a natural lift fighting in front of a home crowd, but I don't think it will be enough to bridge the skill gap. Of course, this is if Wlod is in fighting shape. His recent troubles may affect his game, and if Green wins I will think most people will attribute it to Wlod's troubles rather than Green being the better fighter. I still think he will lose, and I hope he can take it as a hint to retire. He has drawn out the last part of his career a bit too long. Fair call to any fighter who wants to cash out before they end their career, but Green has made his money now and it is probably time he turned to other things.
Both have lots to prove after their last fights.... I think they both really need the win, I'd like to see Wlod get past his personal issues and keep the belt and see a decent title fight next year..