Old Man Logan was also drawn into the main Marvel Comics continuity for a while, a time when the main Wolverine was dead.
For those unfamiliar with Old Man Logan, he hails from an alternate universe where Earth has been conquered by super villains and nearly all of the Marvel superheroes have been eliminated.
The older Wolverine lives a quiet life with his family and has sworn off using his claws, but a tragic event pushes him back into action.