Here's a hot take - Dredd remains, kept alive by 22nd century technology, as a symbol of law and order in Mega-City One. Over the years and decades the cult of Dredd grows until it unifies Earth against emerging threats from other systems and planes. Dredd is kept alive for centuries, remaining a figurehead for humanity, though nobody can really know what goes on in that addles mind and body. Yep, my hot take is that Dredd is the Emperor of Mankind from Warhammer 40K!
Bonus points if it can be fitted in to Termight chronology as well (let's face it, the 40K empire was mostly ripped off from Nemesis the Warlock anyway).