We should also note that it might not be too late to hear Russell Crowe speak Kryptonian in a DC film at some point.
Although Jor-El physically dies at the beginning of Man of Steel, and General Zod destroys the digital manifestation of his consciousness, Russell Crowe has championed a Krypton prequel film at various points since 2013.
There’s currently no indication that DC intends to go down that road (particularly when we consider how crowded the DC slate has become), but the sheer number of left turns that the DCEU has taken over the years means that anything is possible.