As if the outcome of Leonardo vs. the original Shredder weren't shocking enough, the Ninja Turtles are blown away to discover they're not alone in the otherworldly realm of the Battle Nexus-or, indeed, in the universe itself. When the twisted battle master [REDACTED] calls for a wildcard match between former flames Raphael and Alopex, their prodigious fighting skills-and unbelievable tempers-could bring down the entire Battle Nexus!