If scene one doesn’t reveal that seasons reveal that seasons 7 and 8 were a dream forget about it. That show just got worse every season and finished awful. Only good part was it gave Jeff Lindsay an opportunity to really roast the hell out of the show in his books.
In particular I never bought into Deb's decline and complete 180 from everything she had ever been. She became a completely different character.
That brings up a thought - how can they have Dexter without Deb dropping the eff-bomb every few minutes? Or her creative uses/adaptations of the eff-bomb?
Really though, it is going to be tough to do, tough to make satisfying for their fans. Sure, a lot of us will tune in for the first couple of episodes to see what's happening. But how do they "hook" people into watching all 10? It can't be more of "oh look Dex drugging, stripping a bad guy/gal and then wrapping them in plastic before dismembering them..." Yawn. Nearly everyone that knew about his former activities are dead. He has no real ties to Miami any more. My guess is their story line will involve Hannah and Harrison. They're really the only unanswered questions.