The show's creator admitted that the popular US series still "has a lot of life left in it", though he will soon take on a limited role behind the scenes.
He told The Wrap: "Steve McPherson (ABC Entertainment president) and I agree that we shouldn't keep the show going for more than a couple years past my seven-year initial contract. We don't want it to just fade away.
"We've been in negotiations. I expect to sign my new deal soon to set up a future scenario for the show. Someone else will run the show after season seven and I will serve as executive producer from a distance."
He went on to explain that the programme had been revitalised by the five-year leap forward for season five, saying: "Yes, I think it worked well. It was a way to start fresh and let everyone start from scratch in a way."
Cherry also revealed that the sixth season will not hold any radical plot devices. However, it will pay homage to a classic Dallas storyline.
He added: "What we've planned is an interesting mystery storyline involving one of our beloved characters. It's a 'Who shot JR?' kind of storyline."
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