2. How Many More Kryptonian Technology Exists In The Universe?
In the movie is explained that Krypton had several colonies all over the universe, and that those colonies were abandoned many centuries ago. We also see that the General Zod travelled throughout entire galaxies in order to find more Kryptonians, however the only thing he found were a couple of ships, some resources as well as the terraforming device. However I'm pretty sure that even for a general with that much knowledge of Krypton's works across the universe would miss a couple of planets that could have some Kryptonian technology. This is something very important, since we don't know what kind of technology they had at the time they abandoned them there could be pretty much anything in those planets. Jor-El managed to create an engine that worked with a Phantom Zone portal, as well as finding a way to turn it into a weapon against Zod. Maybe someone else could find some of that technology and do something like that with catastrophic results, hell, they might give a new origin story to Brainiac using a similar idea.