I think if they ever made a Vegeta solo movie, like Torishima once suggested, it should take place in the GT universe. Imagine something in the vein of Old Man Logan, but with Vegeta as the last Saiyan standing. A hundred years have passed, Goku’s gone for good, and nobody’s coming back this time, no resurrections, no miracles, no dragon balls. Whatever new threat appears, Vegeta has to face it alone. He could be living as a ranger or farmer, just trying to find peace in a quiet world. But the lingering effects of the Blutz Waves from his SSJ4 form, that have left him aged and weakened, like the radiation slowly killing him. That gives the new villain a real chance to take him down, and it gives Vegeta a final, meaningful struggle.