>>536631081
BV being the catalyst which sets off the franchise (barring Mimic shit) is pretty solid as far as anything in FNAF can be. BV dies, William kills Charlie in retaliation to hurt Henry cause he's a spiteful asshole who would never accept his shitty parenting is partially at fault, notices changes in the Puppet's and/or Fredbear's behavior, creates the Funtimes to experiment, gets Elizabeth killed on accident, receives confirmation of possession through Baby, and then does the MCI, etc, etc. Also, it's canon that William and Michael look almost identical barring differences in age