Wizards of the Coast (WotC) recently announced that there will be a Banned & Restricted update on Monday, May 18:
Much like a similar announcement made by WotC on April 7, what this Banned & Restricted update will be about is, once again, much clearer than previous announcements — changes to Vintage, Legacy, and Brawl are likely on the horizon. It appears as though there will be no updates to Standard, Pioneer, or Modern and players can expect a full article on Monday, May 18 explaining the thought process behind the decisions that will be made.