What's up with these unused buildings?

First, CurbedSF reminds us that the Armory may be vacant for a long, long time.

Second, in the Examiner, Ken Garcia gives us a little hope that the recently closed Metro Theatre on Union Street may not be gone forever.

The Armory, 20 More Years of Empty? [CurbedSF]
New life for the Armory, finally? [SFHomeBlog]
Metro Theatre screen goes dark in latest blow to cinema palaces [Examiner]
Kabuki Theatre Sold to Sundance Cinemas [SFHomeBlog]