A few `other realities to remember:
-25 years have gone by. This is not negotiable with the cast and original characters.
-Dead characters would not reasonably return...certainly not as portrayed by the original cast.
-Harrison Ford as Deckard is out. Replicants don't last that long, and even if they did, it would be decades later in the story.
-There isn't much left of the story. With most of the characters dead, a really careful examination of the story is the only way to dredge something up...the sequel novels just don't do it.
Since DADoES is kind of an adaptation of RUR, it seems a good idea to reconstitute it in the BR story line.
If I were to approach this idea; I would start by deciding whether or not Deckard is a Replicant...new day, new opinion.
Remember the
Holden Postulate.
To keep continuity, Deckard should stay something of a mystery. Both Rachael and Deckard, should be missing from the story and it should pick up within a couple years of BR.
The surviving list of characters:
Gaff
Bryant
Holden
Rachael
Taffey Lewis
Deckard
The surviving list of actors:
Sean Young
Harrison Ford
James Hong
Joanna Cassidy
E J Olmos
M E Walsh
R Hauer
Joe Turkel
Morgan Paull
Not much of a result there to continue a story since so much time has passed.
So who is left with someone to play the parts??
Deckard
Rachael
Gaff
Holden
Bryant
The result is that any story would have to revolve around the surviving humans and new Replicants.
Here is something that would work:
The real version of Rachael returns to Earth to manage her uncle's affairs and run Tyrell Corp.
This could work as a beginning and reuse Sean Young (the real Rachael or whatever her name is)
Another actor (Paull?) could serve as the "real" Deckard who, for whatever reason is also on Earth.
The bulk of the story would result from filling the holes in plot and presentation.
Questions for the story to answer:
-What are Replicants really?
-Why are they really illegal on Earth?
-What caused the disaster that killed off all the animals?
-Are the characters really even on Earth??
-What were all the wars about?
-How far are the colonies?
-If Tyrell makes the only Replicant soldiers from Earth, where do their enemies come from??
-Does the enemy army have Replicants too??
-Who makes the enemy Replicants?
-Who are Tyrell's competitors?
-If Replicants are genetically manufactured, why can't real animals be created?
I'm sure you could think of many more.
This is the basis for a serious sequel.