Maybe! but, Stone Sour Never had Material already written for the records and just came naturally. Disturbed has always had pre-written material for every record. I hope your right but, i doubt they would go away from their Formula.
That could be assuming they had songs uncompleted from all 5 albums and i don't think that's the case. We will wait and see. You could be right and they could start writing and keep writing having lots of material for a double album.