I know this might sound absurd, but I think Disney could help revive the brand to appeal to current fans and the younger generation at the same time. Look at all they did for Star Wars - movies, TV shows, rides, etc. They could create Dallas continuations, spin offs and prequels for Disney Plus. A tour of Southfork might be cool. The ride takes a sudden turn around when restless show up and start shooting. It becomes faster to ride guests out of the pasture to safety.
There has been quite a bit of backlash from Star Wars fans since Disney gained the rights.
Many, Many Star Wars fans have been vocal about how they dislike the direction of the franchise.
Even George Lucas and Mark Hamill have been less than enthusiastic about it.
The Hans Solo movie lost money, and the 3rd installment of the movie had a =/- 50% decrease
from the box office total for the 1st movie.
Hasbro had to lay off workers because merchandising sales have been disappointing.
While Star Wars is no doubt profitable, it could be even much more so,
with better management.
I have not seen the Disney Trilogy movies, I have no intention of seeing them, simply
because I am not a big Stars Wars fan, except for the original and The Empire Strikes Back.
I will defer to the Stars Wars fans with regard to quality, or lack of quality, about the Disney versions.
All of this is to say that I don't think Disney would be the best choice for a new "Dallas',
based on the Star Wars experience.
Whoever does manage a new version should be someone who respects the show
and understands the fan base.