Nothing is official yet but the going theory is that this is a somewhat odd (but very effective) hype campaign for Chapter 2 of the game. Some hints have been discovered that the game servers will remain down until Tuesday, 6AM EST.
BREAKING:
— Lucas7yoshi - FNBR Leaks/News (@Lucas7yoshi) 13 oktober 2019
I have independtly confirmed the authenticity of a discovery that points to "The-End" lasting until Tuesday, 6AM EST
This is not stuck in stone, this info is from https://t.co/0TDeMk7Bda code. pic.twitter.com/ElnNFKppWn