You only live twice

In the comics, the characters cannot stay dead. Which is fine, and I don't have a problem with it. However, on the big screen, things don't work so well when a hero (or, very rarely, a villain) is brought back to life. It simply steals from the tension of a movie.

Coulson is, by far, the biggest of all offenders, with his death's significance being annulled once he returned to life. We can also mentioned Professor X (disintegrated and then, in the same movie, revealed to be alive), Nick Fury, Bucky Barnes, and, of course, Superman (in this case, this is a double offense, since it was actually revealed in the same film that he lives "“ as if we didn't see it coming).

And then, of course, there is Loki and there is also Zod, both villains being brought back to life, just because the script needed a good villain (maybe this isn't so for the latter).

If a hero dies, it has an impact on the entire shared universe "“ reviving him as soon as possible makes me wonder if there is an actual threat in the shared universe for him. If a villain dies (as it happens so often), maybe he should stay dead.

If not, maybe the villain shouldn't die, at all. After all, he is facing heroes and not killers.