They have zero hope. And there's no hope expressed in this text:
Matt 8:29
When He had come to the other side, to the country of the Gergesenes, there met Him two demon-possessed men, coming out of the tombs, exceedingly fierce, so that no one could pass that way. 29 And suddenly they cried out, saying, "What have we to do with You, Jesus, You Son of God? Have You come here to torment us before the time?"
NKJV
It sounds like the demons also knew they had NOTHING in God, just like the devil himself has nothing in Christ! And they certainly understood what their end would be!
Did you know that Adam also had empirical evidence for God?