I’ve previously said that Lefebvre’s Métaphilosophie will appear in English translation in 2016 with Verso. Another translation will also appear next year – La pensée marxiste et la ville, with University of Minnesota Press. This follows from their previous publications of his work – The Urban Revolution; State, Space, World; Towards an Architecture of Enjoyment; and the reissue of Dialectical Materialism.
More details on this and Metaphilosophy when available. There is at least one other project in the works. I will need to update my reading guide – Where to start with reading Henri Lefebvre?