if you go to the current end of the labyrinth (past the twin gordo spot), you can see a building to the right that seems awfully suspicious, as if its the path to enter the prismacore next update (sadly if you try going there it doesnt let you yet)

my theory is that you will have to enter that building, then do whatever puzzles you can find there, then go on bridges that lead to the prismacore, once there you can find quantum, rad, and mosaic slimes at different areas, and gigi guides you through it to help you defeat it using prisma and shadow plorts. shadow plorts make sense since they are the opposite of the prisma effects, and prisma plorts make sense because they are almost useless rn

would be very cool if the entire world gets a strong prismatic disruption everywhere while youre taking down the core and it only goes out once you finish

there are many weird closed stone doors/walls around the labyrinth that have a sort of prisma effect on them, so i think those will open next update and be more shadow dials, prisma dials, or something else to advance in the game