Update: Concept art and leaked footage has hit the net.
At their big Hall H presentation earlier today in Hall H, Warner Bros. played a video on the big screens surrounding the audience that featured their upcoming slate of movies with Green Lantern Corps among them.
The video also featured various concept art and logos for the films which included:
• Batman v Superman: Dawn of Justice
• Suicide Squad
• Wonder Woman
• Justice League 1 & 2
• The Flash
• Green Lantern Corps
Previous rumors mentioned that WB was looking at using multiple Green Lanterns for the reboot, which this reveal looks to have confirmed.
The Green Lantern Corps movie has a 2020 release date, but most likely we'll get a first look at the GLC in the Justice League movie (it would be pretty awesome if the GLC was involved in some sort of war which would explain their absence during Man of Steel).