Four years.
It had been 4 years since Dragon and Cowboy defeated The Big Boss and cracked his operation. The police force shortly took him to jail after the final fight for assault and planned theft.
The boss is in prison. Angry, unhappy. While other prisoners are doing body-slams and playing card games, The Big Boss is sitting in his cell with anger and crossed arms. "Those jerks. Those two stinking sporty boys cracked my operation. I'll get them back if it's the day I DIE." He would always vow that to himself. He didn't know that day would come.
On one sunny afternoon, an officer came up to his cell. "Hey." He said. The Big Boss was still fuming and thinking to himself in anger. "HEY!" the officer yelled. The Big Boss was for once, distracted while vowing to himself. "What?! WHAT'S THE MATTER!?" he yelled. "You interrupted my fuming session. This better be good." The officer sighed, knowing whoever made the choice didn't get enough sleep. "You're out of prison." The officer yelled. Most prisoners would have jumped in excitement or even hugged the officer. But The Big Boss gave him a death stare and a slight chuckle. "You wish." He said. "I'm staying here for eternity." The officer sighed. "If eternity to you means serving a life sentence, then go for it." The Big Boss' eyes opened up wide. He begged the officer to let him out until he cracked. "PLEEEEASSSEEE! I DON'T EVEN REMEMBER WHAT THE SUN LOOKS LIKE!" The officer smirked and let him out. He gave him his clothes and wished him luck. He might've needed it.