EXCLUSIVE: Marcella producer Buccaneer Media and Baltasar Kormakur's RVK Studios have pacted to co-produce The Reykjavik Confessions. An English-language dramatization of one of Iceland's most mysterious murder investigations, it has John Brownlow (The Miniaturist, Fleming) attached to write. The story is based on the 1974 case in which two men vanished in the barren outskirts of Iceland's capital 10 months apart, After six months of unsuccessfully trying to pin the…