Satan's time coming to an end? How do you figure? He's an angel so he will probably be around a l-o-n-g time, probably until the END of time. Then our good Lord will do ... something with him.
Maybe the angels Rafael, Gabriel and Michael will destroy their fellow created angel, Lucifer, AND all his minions. I hope I get to see THAT one...from a rather HIGHER and safer point of view, of course.
Refering to the NT book of Revelation.