I think Luman would be the perfect person to rescue Dex from Hanna and what ever else season eight has in store from him. Dex and Luman could walk away similar to how Luman did in season 5.
I really hope so. Lumen was in over half season 5, and Lumen is the only person up until the end of season 6 that knew Dexter and wasnt dead. I thin it would only be fair to the series to have Lumen revisit season 8, maybe Lumen Dexter and Hannah can all do a kill(s) together, Clean Up Miami, Once and For Good!!