>>3830286The problem with Demon Ciel is threefold:
>Not in the manga (obviously)>Book of Circus, Book of Murder, and Book of the Atlantic all already ignored it and pretended it never happened>After becoming a demon, Ciel faked his death, left his old life behind and went to Hell with Sebastian; pretty difficult to square that with him still going on missions for the QueenMore than creative thinking, it would take retcons and asspulls that would just confuse people even more. And keep in mind, I say this despite loving season 2 and its ending being one of my favorite anime endings ever. Imagine how pissed the fans who hated the original content would be.
Speaking of Book of the Atlantic and season 2 - I just finished my anime rewatch yesterday and couldn't help but notice that Ciel's disguise early on in the movie looked a bit like Alois, and also his taped-up eyepatch was reminiscent of Hannah.