How about this for a twist? Instead of ending up in the US, Clark lands in a part of Asia. What if he isn’t recognized as being Superman? I don't know if this Clark is bilingual. It could work either way.

He meets the only other European/American patient in the facility – a long-term memory loss female with dark hair.

That would explain why no one could find her in Africa.

I have way too much on my plate to even think about approaching this idea but it might be fun.

Bob