Michael Myers, who was thought to be dead after a shootout with police in Haddonfield, is actually alive and comes back a year later to kill again, this time his little (posted here) niece, Jamie. Afterwards, Jamie attacked her stepmom and lost her voice. She has been sent to a nearby children's hospital for help and recovery. It will be over for good if she can cut off the mental link to her bad uncle.
Michael Myers sought RÉVENGE after his return! To avoid the awkwardness of killing your family on Thanksgiving, you should wait a year before doing it again. We don't fully forget about Jamie stabbing her mother, but we also don't bring it up when she returns, since... it's more samey that way?