Well we will see what new Raid they will release once CT Storyline is over (Most likely in Crystal Tower Raid 3 since Xande is the final boss for CT Raid 2)

Though it is also possible for this place to end up as the new Endgame Dungeon once Coil storyline ends since Coil 1 revealed that there are only 2 coils left after Coil 1 and we have Coil 2 already. This means it is possible Coil 3 will be the last Coil and a new Endgame dungeon will be released to succeed Coil.