Through Superman: Legacy, the new DCU will pay off on the potential of the Green Lanterns 12 years after their last cinematic appearance. There were multiple teases of the Green Lantern legacy in the DCEU and several attempts to bring them into play. Sadly, none of them paid out, but DC Studios co-CEO and Superman: Legacy director James Gunn has made it clear that utilizing the Green Lantern Corps is a top priority for the new DC Universe.
https://screenrant.com/superman-legacy-pay-off-green-lantern-tease-12-years-later/