I predict that:
1. There will be a bitchfight because someone used someone else's things without permission.
2. At least one contestant will choose the Tsunami victim's fund as their charity of choice when hocking off their legacy item on eBay.
3. Someone will cry about a missed loved one.
4. Two people will become a couple in the house. Only this time, it's a gay/lesbian couple... 0_0
5. Someone will get pregnant in the house. (Hey, how funny would it be to watch a stressed out pregnant woman yell at everyone on TV? And hey, bonus points for a live conception.)
6. Gretel will have another toyboy by the end of this season.
7. The camera in the toilet will actually get used, and we can see people relieving themselves.
8. Someone will get told off for breaking something.
9. Someone will smuggle a camera/mobile phone into the house.
10. Someone will scale the walls and escape the house.
(OK, number 5 probably won't happen, but how funny would it be?)