User blog comment:B214/Light Novel Volume 16 spoilers/@comment-162.202.198.72-20131026072404/@comment-16281343-20131214103230

Yeah, it can even be a good setting Ishibumi has plans for following HSDxD with a new series with Millicas being the MC.

~Like, even though 666 wasn't unsealed successfully, there are evil manifestations appearing because of him/ it that wants to completely unseal him and Millicas, with his peerage and the ORC to support him to completely seal 666. XD