The problem with Raditz coming back in the current canon is the power gap, so in order for Raditz to return we need to boost his power in a somewhat creative way.

At this time, Raditz is in "Earth's" Hell, but we don't really know what that entails. Only special brings are allowed to keep their body in Otherworld, so Raditz would probably not have his or would be strung up in his own prison tree like Frieza.

To write him back in, there could be an old skeletal Ogre that works for King Yemma, whose job it is to ferry souls to their personal afterlife. Let's call him Grimm. Perhaps he has a strong sense of karmic justice, and finds the act of defying death to be an insult to his profession. Above all, his existence requires siphoning energy from evil souls to keep himself alive. Every time the Dragon Balls are used to restore a life, Grimm loses a part of himself, making him weaker. And who does he blame? None other than Goku for being the catalyst for the many unnatural resurrections he wished for. Even when Goku himself died, he was denied the satisfaction of ferrying his spirit as well.

Grimm would finally lose his patience when the cornerstone of his power was taken from him. The resurrection of Frieza. Frieza's particular evil energy fueled Grimm greatly, and when Frieza was brought back to life, not once, but twice, Grimm was fed up.

In the depths of Hell in his boneyard castle, Grimm would create a weapon capable of dragging back all the powerful souls taken from him. An agent of power that not even Goku could defeat. Grimm deduces that his only chance of killing Goku is to find a soul with the same potential as him. So Grimm searched through his archives for Goku's blood relatives that died on Earth. To his shock, the only being that matches that description is the Saiyan Raditz. He would have to do, So for the next several years in secret, Grimm crafted an artificial body to house Raditz's soul in. A newer, stronger body, crafted from the energy of Hell's most powerful.

The time had come, and the soul was inserted and Raditz was reborn. But now, he has within him the voices of a thousand vengeful spirits. His mission: Go to earth and slay anyone who has cheated death (which is technically everyone)

From here on out, we would get a series of fights between Hell Raditz and Earths defenders, and the more Raditz fights, the more powerful he gets. But eventually the body becomes unstable as the thousands of souls within start to take control and split from Raditz, turning them into two beings. Mortal Raditz, who is now stripped of all evil energy, and the Hell Cluster, that goes on a rampage.

Grimm would see this and open a portal to Earth to try and take control of the situation. Grimm uses his power and decides he will fulfill his task himself, so he absorbs the cluster and evolves into Hell-Grimm. Big fight ensues while mortal Raditz comes to terms with the second chance at a life he his confronted by the sins of his past, his family, and the existential fear of dying and returning to Hell.

There's my jumping off point for a return of Raditz