What’s in the fnaf 4 box?
Incriminating evidence that both Michael and William buried away. Murder weapons, trophies, fake IDs, etc. This would explain why there is an answer but not specific or consistent enough.
Nobody talks about how the box has two locks suggesting co-owners. I believe William set it up as a leverage play over Michael. It’s no secret Michael was an accomplice. The extent remains unclear however I believe Michael was more involved than fans are ready to accept. I’m talking MCI and Charlotte Emily stuff. In his only cutscene, Michael talks about how the possessed funtimes didn’t recognize him. He didn’t sound like a guy who just made the most gruesome and disturbing discovery. He knew all along just like movie Vanessa. Their sins remained forgotten in that box until he revisited it decades later where he finally freed the souls of CC and his father’s victims via Happiest Day.