The upcoming rebooted DC Universe is already promising new versions of classic heroes, including David Corenswet's Superman. Batman, Hawkgirl and at least one Green Lantern are also confirmed, with several other characters likely on the way. When it comes to those who haven't been announced yet, however, there are numerous DC heroes who absolutely must be included.
Source:https://www.cbr.com/dc-characters-deserve-in-dcu/