They could of way before, imo. There was a 3 pack with Batman Beyond, old Bruce, and Warhawk. Should have put GL instead of Batman since there was already a single of him out.

But as you say if they did get around to him, they could have done another 3 pack - GL and (designs made up for the toy line) of Wonder Woman and Martian Manhunter since in that Static Shock episode "Future Shock" it was inferred they were still active heroes.