An announcement on the Catholic 7/Big East split is expected today. The new Big East will likely add Xavier, Butler and Creighton for next season, starting the new league's operations on July 1, 2013. Dayton and St. Louis remain candidates to join a year or two later. According to an exiting Big East source, the new league still has to pursue expansion, conduct a commissioner search, draft league bylaws, and complete fall championship planning. Thursday's announcement is the finality of the exit.