Each character is sitting in their world going about their business when suddenly they get a computer transmission. Kevin Butler pops up on a screen, informing all that Sony's network is under attack by what appears to be an elite group of hackers. You work along side Butler and Polygon Man to take down these hackers, the reward, the winner get's to be Playstation 4's mascot.
The final boss is just some obese guy sitting at his computer chair. The final boss is an elite member of a hacker organization, bakced up by his hacker allies and body guards.
I figured everyone is fighting each other in a turnament put on by Calypso so they could have there one wish granted to them, like Kratos fighting to bring back his family.
"You know the carnival comes and goes. If you wait for a while, it'll always comes back to you..."