We get more than we bargained for when we review "Oneechanbara" (AKA "Bikini Samurai Squad"), and it's sequel "Oneechanbara: Vortex).   Can scantily-clad heroines save the world from yet another undead apocalypse? Can samurai-cowgirl Aya stop her sister Saki's stupid schoolgirl schemes, from bloodthirsty rampages to skeletal resurrections? Can sequels be bothered to acknowledge ANYTHING from the previous film? It's time for a Double Dose of zombie-slaying action!   CONTENT WARNING: sibling rivalry, kung-fu zombies, sexy corpses, hungry swords, mild language.   Featuring the voices of Marc Athanas, Wayne Bressette, and Nick Mohr.   Our theme music was composed by Jack Feerick, and performed and realized by Sam Feerick.