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I just got home from work and wanted to share how I'd wrap up this arc, since it was left open.
Basically, the main character would be forced to fight in the arena. He'd win a few matches, but eventually he'd become too exhausted to keep going.
At his lowest point, ready to die, someone would show up and save him — rebels who oppose Zod's regime.
The MC would be freed and regain his powers.
Meanwhile, his team would use the tracking device Henry gave them to locate Kara, who's unconscious. They'd bring her to the MC.
Fearing what the MC might do, Zod would activate the device that opens the portal back to Earth.
After reuniting with his group and taking his sister, the MC returns to Earth through the portal — where he faces Zod in a final showdown.
Henry would spend some time with the rebels — future members of his empire.
He'd use the device he left with Kaelia to make it back to Earth.
Meanwhile, Zod and his allies would be celebrating, thinking the MC is trapped for good.
But the MC returns to Earth and leaves Kara in safe hands.
Even though he's still weak, he faces Zod and the other Kryptonians in battle.
He wins — but in the end, he takes a brutal hit and starts bleeding out.
Eve sees Henry in danger and flies to him as fast as she can.
In the end, she heals him and restores his body — including his hand.
That's the end of the arc.
After that, Kara wakes up, confused about where she is. She meets her brother and is introduced to the Teen Team.
The rest of the story follows canon, with a few small changes.