Been reading this avidly as well.
Liking it lots!

My theory:
Wasn't there some kind of "tank" mentioned in the earlier chapters?
What if this clone harbours the "soul" of Lex Luthor?
I couldn't help myself, but this Superman's way of speaking... it reminded me a lot of Luthor. And Asabi was also part of his mentioned staff... so...

When's the next chapter coming in? ;-)