The OA2020 Initiative has launched with an "Expression of Interest in the Large-scale Implementation of Open Access to Scholarly Journals."
Here's an excerpt from the announcement:
A growing number of research organizations want to establish an international initiative which aims to convert the majority of today's scholarly journals from subscription to Open Access (OA) publishing. This is the result of the 12th Berlin Open Access Conference hosted by the Max Planck Society in December 2015. An Expression of Interest, published today and already adopted by thirty signatories, invites all parties involved in scholarly publishing to collaborate on a swift and efficient transition for the benefit of scholarship and society at large.