After a portal transports the Ninja Turtles from their world to Gotham, they team up with the city's brooding vigilante. Together, the five of them race to defeat The Shredder and Ra's al Ghul—the former has followed the turtles over and set his nefarious sights on Gotham—before the quartet's mutagen wears off in the alien world, and they revert to non-ninja turtles. For anyone who grew up in the '80s or '90s, the Batman/TMNT team up is the stuff of dreams, and in this six-issue miniseries, it achieves perfection. James Tynion IV's script and Freddie E. Williams II's art perfectly bring life to these five iconic heroes, paying homage to both Batman's dark nature, as well as the Turtles' collective levity. Comic book crossovers don't always work, but Batman/Teenage Mutant Ninja Turtles proves how great they can be when done properly. (www.dccomics.com; www.idwpublishing.com)