But while their returns from the Great Beyond were joyous occasions in the comics, in the real world, they'd cause total anarchy. Proving someone's death would become the biggest hassle ever. Every time you'd try to cancel your dead grandma's phone service or credit cards, Comcast or VISA would be all, "Yeah, but what if she was a Kryptonian or a super soldier, and will resurrect soon? Let's give it a few more months before we do something crazy, like stop billing her."
In superhero universes, death is probably treated like workplace injury -- everyone assumes you're faking it, and almost certainly hires investigators to catch alleged corpses coming back to life. In Netflix's Daredevil, there even exists a cult of ninjas with the ability to bring people back from the dead. Are they alive? Are they dead? Do they still owe Columbia House money?! That's something we'd need to figure out, and fast.
They'll revive Elektra as many times as needed to get a decent spinoff out of her.
All of our existing contracts would have to be torn up and rewritten completely. On the plus side, newlyweds would get to say, "'Til death do us part ... barring one of us being an alien, or the work of occult ninjas."