Bornakk posted a tentative date for the announced end of Arena Season 5, indicating that the season can end "as early as April 14" or a week after. It should be noted that the first four Arena seasons had no breaks in between, with one season beginning immediately after the last ended. Arena seasons were only suspended upon the release of Patch 3.0 leading up to Wrath of the Lich King, with the first season of Level 80 Arena play beginning on December 16. This time around, however, Bornakk makes it clear that the next Arena season will not begin immediately but have at least a one week break before Season 6 begins.
