Which should I do?! I need votes!!(Deadline: 13th December 2011)

I'm planning to write a fanfiction for the PJO/HoO series, but I can't decide which of these I should do! I've posted a poll on my previous fanfic(which was kinda failed...) on which I should do but I haven't gotten any more than 12 votes. Here are the fanfiction ideas so help me decide please!!

1.Hunters vs Amazons(PJO/HoO)
-OC story. The Hunters of Artemis and the Amazons have had a long-standing rivalry, but one cursed demigod was to change that. In this story, the two camps are friends.

2.Mother of the War God's Daughter(PJO)
-We all know the toughest girl at camp, Clarisse La'Rue. But what is her background? Who's her mom and why is she staying year-round at camp?

3.The Other Side of Reality(PJO/HoO)
-Some of the demigods from both the Greek and Roman camps somehow ended up in a parallel world where the everything is reversed. The gods are evil and the titans are the ones ruling and flirting with mortals!