Constant Challenges, No Certainties for New CEOs at Market Basket08/06/2014 12:00:00 PMCallum Borchers, The Boston GlobeConstant Challenges, No Certainties for New CEOs at Market BasketJames Gooch and Felicia Thornton were appointed in June. Photo Credit: Portland Business Journal Photo (right) Constant Challenges, No Certainties for New CEOs at Market BasketHelp wanted: Two chief executives to replace one cult hero at regional grocery chain. Will be scorned by employees loyal to former bossIn the NewsIn the News