I got a great idea for a video game, say you take a game that's sorta a open world rpg, right?..so through out the campaign you make decisions that shape the world around you and at the same time level up.
You come to become attached to the the character. You've built them up, they are powerful and influential. So..the game ends, right?
In the DLC, you start off as someone who is an enemy of what your character did, it's a rags to riches story. Your character is affected by things the character you had did. And now you have to go up against what you built.
So the better you played the game in the orginal game. The harder the DLC will be