Thereīs one thing that Iīm thinking about.
At a episode (I donīt know wich) they showed us that the girl wich was suposed to draw a line every day stoped.
That means that the geass power isnīt without end.
So in a few days or years Scheizel will come to his normal self.
I think itīs a good option for a new Code Geass.
Sorry for my horrible english...