I think it can go one of two ways. The whole new manager syndrome where players play out of their skin to impress and we'll win them all, or we'll limp along like we have been under Hughes recently until the new management team have shown the team how to defend as a unit.
Also, I suppose it depends on whether or not the Hughes fans in the dressing room will take to Mancini given he apparently only speaks broken English and has ousted a manager that they genuinely believe understood them better than anyone else.