Episodes 7 and 8 of this season’s Doctor Who had the Doctor fighting Sutech the god of death. At the end of episode 7, Sutech arrives on Earth and turns people to dust. In the next episode, the Doctor travels arround the universe to learn that everyone was turned to dust. He returned to Earth and killed Sutech and said “What happens when you kill death? You get life!” and just like that all the people who had been turned to dust stood up from where they had been dusted. There was more to the story because two episodes is two hours but that was the gist of it.
Turning to dust when you die is a common trope, https://tvtropes.org/pmwiki/pmwiki.php/Main/NoBodyLeftBehind
Sutekh destroying the whole universe puts the scale similar to the MCU, but I’m not sure its an homage/reference.
Starlin misspelled Thantatos, the Greek God of Death, when he created Thanos. Sutech is an alternative spelling of Set, the Egyptian God of Death.
Set wasn’t the god of death. He was the god of storms, disorder, violence, and foreigners. The egyptians had no god of death. Osiris was the lord who watched over the dead and Anubis guided the dead to the afterlife.
Nevertheless, Sutech was called the God of Death by the Doctor.
That’s not turning to dust. That’s fading away like when Obiwon died or when Yoda or Luke Skywalker died. They just disappeared which is good for a PG 13 rating because kids don’t see a dead body.