The image that Lois sees in the future of Clark's shirt with the Superman logo on it, torn and blowing like a flag in the wind, is a reference to the Death of Superman comic, in which his torn cape is displayed the same way after having been killed by Doomsday. See more
The towers are the key to the Kandorians' power. They collect all the sun's radiation, turn it red, and then beam it back to the LuthorCorp satellites.
Those satellites take the radiation, they beam it back down to Earth. Giving those alien SOBs all their superhuman strength. Now, we take the tower down, we shut them down.
Guys, I've seen Zod's troops. We are seriously outnumbered. We'd never reach it.
We don't have to. We have a secret weapon. Watchtower. I powered down Watchtower so the ...