My own thoughts on the Clan Choices coming at World's is that they are going to be more than just "who is in charge of Village X". The Unicorn Clan's Choice revolves around Hisu Mori Mura / Toride, because that was their major development in the storyline. They rejected the Lion's (backhanded) offer of peace, chose the path of war, and took the village. Who gets to be in charge of that village is the next logical step in the story.
The Crane Clan's story has been one of whom does Hotaru listen to and trust. Her sister? Her brother? Kakita Yoshi? I expect their choice to be which family will she draw a close adviser from, someone to be either her voice in the court (Kakita, Doji) or her sword on the battlefield (Daidoji, Asahina in a "seek peace" aspect).
The Dragon Clan's story has been surrounding the rising threat of the Pure Land Ethos in their land, and how ignoring it in favor of becoming involved in the affairs of the Empire will cost them. I would expect their choice to be which family will be tasked with dealing with the Pure Land Ethos in their lands. The Togashi will try to understand, the Mirumoto will try to fight, the Kitsuki will try to root out, and the Agasha will try to use / transform them.
The Crab Clan's story is all about what they are sacrificing for their war. Their choice will likely be choosing which family will take point against the growing forces of the Shadowlands at great cost, since the Crab Clan are all about sacrifice, with the Hiruma favoring indirect warfare, Hida on direct warfare, Kaiu on defensive warfare, Yasuki seeking to hire mercenaries, and the Kuni looking to turn the Shadowlands on itself.
The Lion Clan story is basically about how little control Toturi has over his own clan. With Toturi going Neutral (and focusing on his duties as Emerald Champion), he will need someone to appoint as his hatamoto, to administer his Clan in his absence. Which family will he pull his hatamoto from? This mirrors in many ways the Crane choice.
The Phoenix Clan's story has been about the growing fantastic mysteries of Rokugan, in the form of the elemental imbalance, the appearance of the Djinni, the conflict with meishodo, and other elements. The Phoenix Clan choice will likely involve investigating the disappearance of Isawa Ujina, as that is a recent fantastic mystery which is central to several characters in the storyline. Which family will take point on this investigation, and will they succeed?
Finally, the Scorpion Clan choice is probably the most similar to the Unicorn Clan. The Scorpion Clan's story has been pretty much all over the place, and that is likely not to stop any time soon. However, with their victory over Toshi Ranbo, they will need to appoint a governor. From which family will Shoju pull that governor?
Again, these are just my Thursday morning speculations. I am not a story writer, nor will I likely be tapped for writing any of these. But if the story choices are just all "who is in charge of this really unimportant thing?", rather than a choice which will shape the story of each Great Clan, but perhaps not the mechanics?
Edited by sndwurks