Revenge of the Reach!

Teaser: Batman helps the Challengers of the Unknown in a fight against a giant spider on Dinosaur Island. Later, after Batman leaves, the team of heroes are ambushed by a group of Starro clones that came from the crashed meteorite.
Main Plot: Following a fight with Evil Star, Batman and Blue Beetle face off against an alien race called the Reach with the help of the Green Lantern Corps. It turns out that Blue Beetle’s scarab is linked to the Reach as revealed by the Guardians of the Universe.