DC just gruesomely killed off a major Batman villain

gamesradar.com:

The Joker: The Man Who Stopped Laughing reaches its 12th and final issue this week. The limited series by writer Matthew Rosenberg, artist Carmine Di Giandomenico, colorist Romulo Fajardo Jr, and letterer Tom Napolitano, has followed Batman's nemesis as he attempts to take his particular brand of chaos and carnage global. In the meantime another Joker is still running rampant in Gotham. 

There have been multiple Jokers in the Batman comics for some time now, though the how and why of it all has been a little confusing. This issue clears things up slightly, while retaining much of the mystery. It also puts a bloody cap on the spin-off series.

In the new issue the rivalry between the two Jokers reaches a head - quite literally on the final page. At the end of the previous issue, one of the Jokers discovered that he was in fact John Keyser, a surgically-altered henchman who has come to believe that he is the real Clown Prince of Crime. He doesn't take this news well, feeling dejected and despondent until one of his henchmen points out that, "just because you're not him, doesn't mean you can't do fun stuff."

The "fun stuff" in question involves kidnapping Jason Todd - who has become a bit of a punching bag lately - and dosing him with Joker Toxin. This brings out Red Hood's psychotic side once more, which the John Keyser Joker (Faux-ker, anyone?) intends to use to kill his rival.

Of course, while Jason gets to rough up the Joker he fails to kill him. Instead, the rival clowns confront each other on a train packed with Joker Toxin as it speeds towards Gotham Central Station. They fight and bicker and laugh with each other before coming to the conclusion that calling this one a draw might actually be the best solution. They