At the first sign of resistance to your planned changes, who do you call upon? If you call upon Gestalt psychologists they will tell you about your conscious and unconscious competence and incompetence; behavioural psychologists will tell you how one person's behaviour influences another; followed by the cognitive theorists and the psychodynamicists. A good first call is to seek employment law advice before you respond to issues arising or act on any workplace issues.
Ideally, you have identified who in the team is likely to resist change and why.