User blog comment:VideoGameFan9012/Season 2's Upcoming Episodes/@comment-1031927-20120727004356

The Partner is The Reach, the original creators of Blue Beetle's scarab. If you rewatch Alienated, The aliens mention fleeing from a Competitor warrior, and in Episode One of season two, they ran from Beetle again.

(For more information, watch Batman: The Brave and the Bold Episode "Revenge of the Reach!" Season two, episode two/Episode 28)