Oroku Saki

Few crossover villains make an entrance quite like Oroku Saki, who crashed into the Modern Age in 2016 courtesy of writers Matthew K. Manning and artist Jon Sommariva in IDW's Batman / Teenage Mutant Ninja Turtles Adventures #2. This is a character who commands serious company — sharing pages with Leonardo, Donatello, Michelangelo, Rocksteady, and none other than the Joker himself — which tells you everything about the caliber of chaos surrounding him. His catalog footprint may be compact at four appearances across this 2016–2017 run, but in a mashup this beloved, every issue counts. For fans of either franchise who want to see their worlds collide at the highest dramatic stakes, Oroku Saki is exactly where the trouble starts.