Board Thread:General Discussion/@comment-5808856-20150312001702/@comment-1031724-20160218053505

Back to the topic of this post:

So it's Bill. Usually he would have been the obvious suspect, seeing as how he's the villain, but I thought he was indestructible. Evidently there was one way to kill him. Also notice how Stan punches him out of existence while he's in the middle of getting erased

Of course I wasn't surprised to hear speculation of his return, but that'd be kinda difficult because this was the final episode, and nothing has hinted at his survival despite his backwards message. (the first character to die in Sailor Moon also says "I will return" as she disintegrates, but doesn't return)