In hindsight, merging the Tarzan and Planet of the Apes franchises is such an obvious idea it's surprising it hasn't happened before now. But at least Dark Horse is doing right by this particular crossover. Tarzan on the Planet of the Apes offers a clever fusion of the two universes, one that avoids the usual comic book crossover cliches. This crossover isn't another case where one character falls through a portal and winds up in another universe.