I know it will be great whatever you write, but if it seems too close to the SR plot, it's been done to death. I.E, he comes home to a 6 year old. How how about Kal-El is forced to come back with Nor's army on the Earth invasion (but of course he's working on a underground within the Kryptonian leadership with Zara's help). He doesn't know about the toddler child so he suspects it is some one else's (just not Ralph!). Just don't spend too much time on Krypton. I feel like that has been done to death too.
Another thought. Start posting! And we faithful readers will tell you!
Here's hoping soon!
Artemis
