So unless Tricky Tony really wants to throw us a curveball, it's looking like chapter 5 will take place in Flower King, then chapter 6 will take place in the bunker. But chapter 7? Not as clear. How could we possibly top a bunker dark world? The only thing I can imagine is that chapter 6 doesn't end with us sealing the fountain, but going down into the "Depths" and then chapter 7 is just full-on Yume Nikki/Omori black space tier.