Well, we knew it was coming eventually. But if reports from two major sports news outlets are accurate, the Naval Academy will make it official soon, joining the Big East as a football-only member in 2015. Both CBSSports.com and ESPN.com are reporting an announcement is imminent; CBS says it’ll come Tuesday. The move would give the Big East 11 football members for the 2015 season and be the latest in a series of shakeups: By the time Navy joins up, Pitt, Syracuse and West Virginia will be out and Boise State, Houston, Southern Methodist, Central Florida and San Diego State…