In the previews it says one more couple will leave the competition. This is what I think:
Diego realizes he has to step up and comes back for Amber asking her to come home. He gives a speil about hes changed, shes believes him and leaves.
Frank decides that he can't live without Heather and comes back to propose to her, she says yes. Divorce papers filed within a year.
Jayre actually takes what he learned from this and instead of accompaning 3 smokin girls to Vegas decides to go back home to Carolyn.
I think it will be Jayre leaving in the end. I kind of wish he didn't because Carolyn annoys me and Eva is really really good looking so is Amanda. *ahem* Anyways...thats my picks, whats yours?