The block-long stretch along Sunset Boulevard - and the original location of Warner Brothers Studios - would have a 13-story office tower, five-story production facility, and seven-story parking structure. Developers of the Hollywood property also want to renovate the Colonial-style mansion. From Curbed L.A.:
Hudson Pacific Properties bought the site, which takes up the block of Sunset Boulevard, between Van Ness and Bronson avenues from Tribune in late 2007/early 2008 for $130 million. When still owned by Tribune, KTLA planned a large expansion of the site, an $80 million renovation that called for adding two towers--a 16-story and 20-story office tower--on the block, plans that obviously never materialized.
No word about financing, though it looks like the proposal is at an early stage.