Days of Future Past

Here’s another X-Men storyline that features time travel. This time around, the Mighty Sentinels, yet another type of robots, rule the Earth. The majority of the X-Men are already dead, with only a handful - Wolverine (obviously), Kitty Pryde, Franklin Richards, and Magneto - left to battle their foes. Their plan involves projecting Kitty’s consciousness into her 13-year-old self to stop an assassination that will lead to the creation of the first Sentinels.

The movie is similar, except for the fact that Logan is sent back in time in the Bryan Singer adaptation.

And, as it happened in the movie, there are plenty of deaths in the comics, including that of Wolverine. During a fight with the Sentinels, he is hit with a blast that literally melts his flesh from his adamantium skeleton, leaving nothing behind to start the regeneration.

It appears that this is the best way for Wolverine to be killed: Tear away his flesh, leaving nothing but his skeleton.