I'm going to be running the Beginner Box for the first time for a few friends. I'm thinking I want to flesh out Otari, but I don't have Troubles In Otari, which I plan to buy and run later. Should I worry about creating conflicting elements of Otari, or is it as sparse on details in the other two APs as it is in the beginner box?
Troubles In Otari doesn't introduce a huge amount of extra information about Otari, but there is a bit. Abomination Vaults has a lot more info, and details on basically all of the important players in town.
Some of it can be found on PathfinderWiki.