Does the devil know what is going to happen to him?
I'm sure that he knows what the prophecies say will happen. He can quote scripture - slightly twisted - but still quote scripture with the best.
He's also heard many sermons on the subject over the years.
But, like most of humanity, I think that he feels he will eventually win against God so the prophecy won't apply to him or doesn't believe God will actually be that heartless as to condemn him. He has certainly tried to mess up God's plans over the years.