The Born of the Gods Banned & Restricted update will be announced on February 3, 2014, which is the Monday after the Born of the Gods Prerelease. The changes, if there are any, will go into effect with the release of Born of the Gods on February 7, 2014.
This is the scheduling which we announced on September 20, 2012 when we tied the updates to set releases. Due to internal scheduling needs we had moved that announcement a week forward for the past few sets. Those conflicts have been resolved and this scheduling will continue for the foreseeable future.