I’m thinking as the show settled into the post Pam and Sue Ellen era, Bobby and April fighting for control of Ewing Oil against Michelle Stevens and Guzzler (now a couple) would have revitalized the show..
The feud would last until the Fantastic Four are compelled to join forces with JR to fight off a villainous force along the lines of Jeremy Wendell and Weststar, maybe even more powerful and more villainous than that.
Cliff would be involved somehow, and in a surprising treat for longtime viewers, Jeb Ames and Willie Joe Garr, out on parole, would join the action. Perhaps their Red File knowledge is what gives the villains early leverage in the battle, and would have been what they used to secure an early release, with the bad guys being influential enough to make that happen.
Sometimes a return to the past is just what is called for!
(Edison Faraday Haynes and a newly-released Willie Gust would wisely stay out of the fray).