here is a list under religion of what was the most sought after leaked information from the LDS Church. Some would be very sexy and very juicy.
https://wikieaks.org/wiki/Draft:The_Most_Wanted_Leaks_of_2009

Religion
Mormons Church records
With recent leak of 1999/2006 Church Handbook of Instructions, pertinent documents and covertly photographed artifacts in the vault at Church Office building or subsidy in Salt Lake City, Utah which expose and negate Mormon Church's claim of divinity and its monopoly on "truth." I.e. the concealed remnants of diaries and letters written by former early Mormon apostle William McLellin [7]. McLellin diary and documents was the main point of interest for convicted double murderer/bomber Mark Hofmann's planned forgery attempt to deceive Mormon leaders to obtain in fraud by deception monetary reward to suppress truth of early Mormon history unfavorable to current Mormon religion. For more info, [8].
Documents of Mormon Church's billion-dollar investment in City Creek Mall and Condominium in SLC, which may put Mormon Church's IRS tax-exempt status in jeopardy if there is verification of the allegation the Church used tithe and offering monetary contributions by the members to fund the project under the umbrella of tax-exempted religious freedom.
Mormon Church leadership's involvement in politics, such as correspondence to ecclesiastical subordinates (bishopric) on policy and attitude towards same-sex civil rights & other sensitive issues relevant and concerning to the leaders. As well as recorded correspondences between Mormon members of Utah legislation and Church leaders on sensitive political issues for legislation purposes which may contravene the separation of church and state.
Uncovered film or audio recording featuring the play with the actor portraying Protestant minister encouraged by Satan/Lucifer (portrayed by actor) to spread false doctrines to attack all religions outside of Mormon religion as "abominable" which was exhibited for qualified "temple recommend" audiences in all of the existing temples prior to removal in 1990 (almost like leaked Scientology orientation video) [9].
Unearthed secret audio or video recording inside Mormon temple with the temple members swearing "blood oath" before removal in 1990. [10]
Documented Church leaders' and lay clergy's cover-up of physical/sexual abuse and of minors by missionaries and members without reporting to law enforcement in some cases [11].
Older editions of Church Handbooks of Instructions from the first edition up [12] for comparison to recent leaked 1968 (truncated), 1999 and 2006 editions.

I think the old temple videos were probably destroyed.

Notice that the demand for documents from other religious denominations is pretty low compared to the mormon church.

Looking at some of the information with the Firm that does Intelligence they seem to say that the church was involved in some sort of conspiracy with using radical militias to help guard the financial arm of the church in South America AGReserve inc. their were over 800 results on wikileak. They had stupid information such as US government hosted security for church leaders in foreign countries but their seemed to be some interesting things. A lot had to do with the kidnappings of missionaries in the 70's. I would like to see more up there.