Let me take a wild guess on what will happen. Audrina will not move out because there would be no need for her if she did. She'll start dating Justin Bobby, shortly thereafter realizing that he doesn't give a sh** about her and only shows up to be on TV and when his other dates cancel on him. He'll return on season five for a reunion and this whole sh** will be played over again. Lo will continue to cause trouble between Lauren and Audrina because she's jealous and conniving with an innocent appearance. Heidi and Spencer will be together and then start their off and on relationship. She will continue with her attempts of looking like a Barbie doll because what who she really wants to be, she's an attention who**. As for Lauren, maybe they'll bring Jason back. She'll continue her school and work with Whitney, date a few guys here and there with no serious outcome. Whitney will continue to provide Lauren with the great advice and teach her life's lessons. Overall, nothing new will happen, the same stuff will be shown over and over. The pro is that MTV will increase the total content of the show from 5 minutes to 10, with only 20 minutes of commercial.