If she was already slated to die this season, there isn't anything they can do to change it at this point. The season has already been shot. Her motivation seems ridiculously simplistic and nonsensical. She's killed the grand inquisitor to gain favor with Vader? It reminds me of Sons of Anarchy. When Juice stole drugs from the club, gave evidence to the cop, and killed a club member......so they wouldn't find out his dad was black? Which is still the dumbest character motivation in the history of film.
The thought was she either survives this season or is brought back in another season, series or movie.
Characters are brought back from the dead all the time regardless of how much sense it makes. Boba Fet fill inside of a creatures stomach and magically survived. I don't know anything about the books however in the movie world im pretty sure tge character was considered dead at that time. In this very thread, people are stating that they don't believe a character could be killed so easily and the character may not be died.
I wasn't the biggest fan and someone correct me if im wrong, but on Power Kanan survived being left in a fire.from what I recall at the time people called bullshit on Kanan surviving the fire.
Unless they show Reva dying in a extreme way, the character can always be brought back.even this season, I don't believe it is un heard of for reshoots and edits to take place post production. To your point, it may not be likely given the short time frame, but it isn't hard to imagine Disney making the decision to save the character to enhance their public image with the last minute change.