Negan is currently the bad guy to beat in the world of pop culture thanks to the popularity of AMC's The Walking Dead, but even with all his cruel, vindictive and brutal tendencies Negan's a nice guy compared to The Joker. So should Joker face off with Negan there's no question the Joker would win hands down.
And yet Negan is stronger than Mister J, and he has his beloved bat Lucille, which he wields like a magic club of sorts, so maybe he could hold his own against the Joker?
Eh, why bother arguing about it when you can watch this episode of Super Power Beat Down by Batinthesun and take their word for it! (Fight starts around 4:45, NSFW language)
-Via Geeks Are Sexy