Once, Sinestro was the most well-respected member of The Green Lantern Corps, before he forsook the power of Will and established the fear-empowered Sinestro Corps. The latest issue of Justice League sees Sinestro go one step further, taking command of an hidden power and, through it, the largest Lantern Corps in the history of the universe!
The multiverse of DC Comics has been in a a state of shock following the events of Dark Nights: Metal. The destruction of The Source Wall – the barrier between this reality and the next – unleashed unfathomable energies and cosmic secrets that were never meant to be known. One of these secrets was the existence of Umbrax – an evil sentient sun whose light generated an Invisible Emotional Spectrum that acted as an equal and opposite force to the Emotional Spectrum which The Green Lanterns, The Sinestro Corps and all of the other various Lantern Corps drew upon to fuel their powers.