The flash forward does bring up and interesting point: About the only thing this Supes will have to do is save wayward biplanes and rescue kittens from tress because he'll have thwarted his entire rogues' gallery before he even becomes Superman.
Heheh. Seriously. When Zod shows up, Clark's gonna be all like "Oh. You again. Punch me twenty straight times and then I'll use deus ex machina to defeat you."