With Eleanor, Chidi, Tahani and Jason collectively having seen Michael and Janet in front of the door to the afterlife, Michael and Janet may have no other choice but to tell the four humans the truth, even knowing that doing so will seal their fates, that being eternity in the Bad Place. The other option may be if Janet can come up with a convincing enough alternate story that the four collectively will believe. What Michael and Janet eventually tell the four humans leads to the four going on a journey of self-discovery, while Michael and Janet decide it is time to write their "manifesto" of what they've learned ever since the start of the experiment concerning the neighborhood.
—Huggo