Phil Coulson is dead. Long live, Phil Coulson! Having said that, we’ve been here before as Clark Gregg’s fan-favourite SHIELD agent/superhero fanboy was killed off in Marvel’s The Avengers, actually giving the team the origin of their name: They would avenge his death. And then he wasn’t dead anymore.
Gregg resurrected Coulson on spinoff TV series Agents of SHIELD, the character having been brought back to life as part of a plot involving alien Kree tech that is too long to get into now. The point is that for five seasons, Coulson was back to secretly saving the world with his team. Eventually though, the lethal side effects of his initial resurrection caught up to him, and the previous season ended with Coulson and longtime flame May spending his final days together in the paradise of Tahiti.

https://www.criticalhit.net/entertai...-evil-coulson/