What Happened To All The Lantern Corps?

Perhaps the most genuinely heroic of the Lantern Corps, the Blue Lantern Corps represent the emotion of hope, and exist to assist existing 'good' Corps in their efforts to protect the universe.

The Corps was initially created when two Guardians - Ganthet and Sayd - are banished for their emotional and empathetic natures, prompting them to create the Blue Lantern ring and form the new faction of the Corps.

This slow expansion of the Blue Lanterns would not last, however, as when the Lantern-hating Relic attacks the Blue Lantern planet, Odym, he almost totally wipes them out, with the exception of Bro'Dee Walker, known perhaps better as Saint Walker.

Currently, with Saint Walker having regained his faith in his powers, the Blue Lantern faction stands at a less-than-colossal one. But given that Walker is essentially Space Jesus, one will likely more often than not be enough for most conflicts.