Yeah I highly doubt Bruce is ever going to do anymore Evil Dead at this point. He spent the last year or so riding it home how "DONE" he is with the role of Ash. Fede Alvarez has also said he does not want to return to the Evil Dead franchise as well citing his intent on working on Don't Breath 2. That leaves the final option which is to do a new Evil Dead with a different cast and crew. Would be nice if Sam Raimi came in to write it but I highly doubt that as well. I want to be excited for more Evil Dead but I don't have high hopes without Bruce being on board of Fede Alvarez wanting to do more. Time will tell, this whole thing could just disappear as well. Wouldn't be the first time Sam Raimi talked about more Evil Dead and it never happened.
3rd option is probably the quickest way to get a new movie...But with the current trend of ignoring sequels (Halloween, Robocop, Terminator), like it or not, it could happen...
Just a crazy idea...
Imagine Sam Raimi comes up with an actual Evil Dead 3 movie (No, no...It's not a typo, I really mean Evil Dead 3) Called it "Evil Dead : Legacy"
The actual idea would be to ignore Army of Darkness...(Maybe not ignore it totally but borrow elements from it)
Anyway, here's a very basic idea of a synopsis :
Imagine 30 years after the massacre in the Cabin. Someone reopen the case of this unsolved mystery (left members of Knowby's family?) They received a strange letter...the letter looks very old. knowbody know where this new element come from. But it's enough for the Knowby family to check it out. They return to the cabin.... The first parts of the movie could be about the investigation...Some reenactments about past events. This way you could do a recap of the previous movies and bring new elements. (The idea is that you don't need to see the previous movies to understand this new one)
Obviously things goes wrong at the cabin since the demon spirit never really left the place....You can imagine the bloodbath.
They eventually open a vortex which swallow the only remain member of Knowby's family....She go straight to the middle age....
Things get worse since the Knowby fall sraight in a battlefield...A battle between the living and the dead "The Army of Darkness" is currently happening...
After the battle they bring her to the King...(Yes you know who I'm talking about. This is how you fit a Bruce Campbell Cameo as Ash)
Peoples are confuse since they did not expect a second hero from the sky after all these years...The old King is Ash which was still stuck in time...(Which bring you back to the end of Evil Dead 2) He wrote the letter...He did not expect someone to come...All he wanted to do was to stop this evil thing once for all...
Since he could not come back, he decided to stay ,become King and fight Evil...Now he's old. He will need help to stop the Dark ones...They're about to finish the book. Someone need to stop them or the story will repeat itself....
Here's start an epic journey to stop the Dark ones and the Army of Darkness....Just add an epic battle scene with an old King Ash fighting Deadite one more time...with his chainsaw arm which he kept all those years for a final countdown....
Bring real horror element, real suspense, some cocky moments from Bruce and a bit of comedy and you got a all in one : "reboot / sequel of Evil Dead & Army of Darkness"