It would be cool to have a lot more dead people from previous seasons talking to Dexter in his mind to wrap things up (figuratively). I'd love to see Doakes again, he was killed off so soon! Classic Dexter, muthafucka.
Yeah it would be awesome to see Rita, Doakes, Trinity or hell, even Lumen again. Just to make this feel like some
kind of epic conclusion to the entire series, which so far it's not feeling like at all.