Ahh, okay, so it was Jon's blood. But I disagree Eradicator didn't take anything from New 52 Superman, because it says the same thing at the Fortress that it said when it encountered Jon's blood. "Kryptonian genome detected", when it assimilates Clark's glasses whatnot. So it seems like there's genetic material there that he absorbed as well. Which would make sense. Easy to imagine skin cells being on the glasses. It seems likely to me that he has the genome of both Jon and New Superman in him. Which could be an interesting dynamic to play with.
Which begs the question who is Eradicator referring to when it says "We will save you too, Kal-El." (and why does it refer to itself in plural)? Is he referring to Superdad or New 52 Superman? My money is on the latter.
Either way this looks better than the first issue. Might check out the full deal. I also saw the splash of Jon revealing his S shirt and I admit it was cute. The childish tongue-sticking-out made me laugh.