As far as I know, the site is still empty. The owners of the land do not have planning permission to build on it yet although I understand that some of the old hangars have been pulled down.
Maripose have 3 proposals for development, with one of them retaining a runway my moving it slightly north of its current position.
One of the issues for Maripose is that the official green belt border lies on the runway so building north of it is harder for them..
That's all I know