I would definitely stay away from the Skywalkers.
I think it would be funny to make the whole post just that single sentence above, but since I'm here, I thought I'd express myself.
And it wasn't a joke either. I would stay away from the Skywalkers, and the Jedi in general.
Why?
The main reason is that we've been teased with what I believe are called different Force disciplines. That basically means that there are other groups of people that practice using the Force in ways different from the Jedi.
The witches of Dathomir are an example of this, as is the monk from Rogue One.
And so, if I were ever to have a chance to work in the Star Wars property, I'd concentrate on a practitioner of one of those other disciplines. More than likely, I would invent my own.
For example...
The Shield Maiden
It was common for some Jedi to express doubts, or even disapproval, of what the Order was doing during the Clone Wars.
It's not hard to imagine someone would desert to train by themselves. To get away from the artificially imposed mission the Jedi Order subjected itself to, and to get closer to the Force so they could listen to it more closely.
After a long time of meditating and listening, I envision this individual forsaking her lightsaber. Instead, she takes up greaves and guantlets, and perfects her unarmed fighting style as much as possible.
Like the Jedi of old, she travels the universe, helping as much as she can. In battle, she imbues her greaves and gauntlets with Force, as was done in the early days of the Force-imbued blades, to use them as shields against blasters, or even lightsabers.
During her travels, of course, she meets many people, and eventually, a small crew of kind travelers forms, going from one planet to the other, doing all they can to help as many people as possible. Soon enough, our "shield maiden" meets potential apprentices...
And a new, different order is born.
The Troubled Gunslinger
Or another example. Let's say a Force-sensitive individual. He's always felt a connection to something, but doesn't quite know what it is. Throughout his life, he explores this connection. Not as deeply as he could if he had a master, but just enough.
Enough that it will let him shoot at exactly anything he wants, no matter the distance, or if he's even looking at it. He grows up to be a bounty hunter, of course. Unfortunately, he's affinity with the dark side of the Force is quite strong.
Because of this, his temper gets the better of him sometimes, and this leads him to take actions he will never be proud of.
Or will there ever come a time when he will?
So Many Possibilities
That's what I would do. These stories happen in a galaxy far, far away. The sheer size of an entire galaxy makes it so that possibilities are nearly infinite. To focus solely on the Jedis is, in my opinion, not seeing the forest because you're sticking your face to the trunk of a single tree.
So Good-Bye Jedi and Skywalkers?
Of course not. The Jedi will always be there. People want to see Jedi. There have to be Jedi.
As for the Skywalkers... Well, I'd rather not dig too deep into that. Whether they're still around after Episode IX is debatable.
But what I would try to do is expand the franchise so that there are not only Jedi.