Spuffure said:

Now, how should joker die in the game? it can’t be at the hands of batman, because he doesn’t kill and golden age doesn’t count. He has to die in an epic way, like falling.
Broken heart…or ends up covered in sand. Joker hates sand…😁
He should die similarly like barbaras attack in KJ, if you go that story route. If not, then at the hands of Jim to protect his daughter, or Harley in some twisted way that takes her to place shell never leave (not literal place). Or shes defending Poison Ivy and you can use that relationship in the story. Maybe ivy killing him. Its a crazy thought but if you could somehow use the swamp thing batman story arc that would be epic…but difficult as all hell. Thinking of a justice leaguer who maybe hasnt killed but could. Or even better robin kills him.