If I came back to life 500 years from now, I suspect I might become hopelessly homesick and depressed for the vanished past. Everyone I knew would be dust, and all my knowledge useless.
Have them sign up with you!
Seriously, do have them sign up with you. You don't have to be alone.
Your brain might contain nothing of value to that society, except as a store of archaic knowledge, or maybe as a substrate for computing. They may never even bother reviving someone as a conscious, self-aware being, or if they do, it may be for a zoo or a lifetime of slavery for the machines which I assume for no particular reason will have taken over.