Marvel has started going PG with many of their content these past few years.
A good example is the Marvel Heroes 2016 game, where the devs have mentioned over a Twitch stream that Marvel has a very specific rule that nobody "dies" in the game.
Basically, they're not allowed to imply that the enemies in the game have died in the hands of your characters. So no words like Kill, Dead, Died, etc. All of the enemies are merely "defeated."
A weird rule in a game that has guys like the Green Goblin, Venom, Punisher, Deadpool, Wolverine, Magneto, Doctor Doom, and Elektra as playable characters that run around blasting/punching/stabbing street thugs and hydra grunts by the hundreds.
