Library of Congress announced a plan for moving away from MARC

The Library of Congress is launching a review of the bibliographic framework to better accommodate future needs. A major focus of the initiative will be to determine a transition path for the MARC 21 exchange format in order to reap the benefits of newer technology while preserving a robust data exchange that has supported resource sharing and cataloging cost savings in recent decades.

This Bibliographic Framework Transition Initiative is the official location for information, announcements, and resources related to this initiative.

You can join the Bibliographic Framework Transition Initiative Forum from here