Dylan writes...

Hey Greg, first off I just wanted to say you and the YJ team kicked it out of the ballpark with phantoms. But I was curious, since Krypton was significantly more technologically advanced than Earth (before its destruction) what with them being interstellar and inventing the phantom zone projector, did the Kryptonians employ a zeta network?
After all Earth was able to create one with significantly less advanced technology and the only feasible in-universe alternative is boom tubes, which are restricted to New Genesis, Apokolips and their allies (since you need a mother/father box for).