Green Lantern along with the rest of this year’s Injustice 2 figures can be pre-ordered at these fine retailers:
These photos show a pair of alternate hands, power battery, and what looks like a huge construct machine gun packed as accessories with Hal. This figure is slated for a December 2019 release.
Hiya Toys’ Injustice Green Lantern is a Previews Exclusive distributed to comic shops and most online retailers. As of this writing, these fine retailers are taking pre-orders: