Wizards of the Coast (WotC) has announced that there will be a Banned & Restricted update on Monday, June 1:
Much like a similar announcement made by WotC on May 11, what this Banned & Restricted update will be about is, once again, much clearer than previous announcements — changes to Standard and Historic are likely on the horizon. However, the biggest news in this tweet is that WotC will be addressing the Companion mechanic in some form or fashion.
Players can expect a full article on Monday, June 1 explaining the thought process behind the decisions that will be made.