Here's Chris' summation of the story:
The basic plot is Aquaman gets wind that dinosaurs are being abducted from Monster Island (DC’s Dinosaur Island renamed for some reason), and calls the JL in for help. Superman joins him as they arrive on the island to find Black Manta herding the dinos thanks to some mind control collars. It seems Manta is just a hired gun for Ra’s Al Ghul, who is eschewing his usual eco-terrorism for plain ol’ world conquering. Aquaman and a humpback whale put the smackdown on Manta, while the other Leaguers arrive to free the dinosaurs.
All in all a fun, if simple comic. Perfect to introduce kids to the League. Too bad their isn’t an appropriate comic on the stands for them to follow this into. Nice story by Joshua Williamson (who the Shrine has interviewed), and crisp art by Christian Duce. I particularly like his Aquaman. The stubble is a nice touch!