system
Given the following post, respond as if you're commenting on Reddit:
human
[Marvel/DC] Would the Venom symbiote be as dangerous in the DC Universe?

We have seen in the Marvel universe that the symbiote family can do a lot of damage and take over a lot of dangerous people. 

Would this creature be as dangerous in the DC Universe?
gpt
I think it is reasonable to believe that Justice League would be completely incapable of *detecting* the symbiote children when they don't want to be detected.

Superman's X-Ray Vision?  Would probably just see what is actually there - some person with skin that is alive.  Not suspicious at all.

That said, it is unlikely that the symbiotes could merge with Supe or the others.  Merging with Batman wouldn't really give the symbiotes any new abilities, as the symbiotes provide the oomph to the human form, though absorbing Batman's memories may prove useful.

Like pretty much everything else that has anything to do with the DC universe, the ultimate question is this:  Can Venom's children figure out how to acquire kryptonite?  If yes, can they figure out how to actually beat Superman with it?

I would argue that they could pull it off, but Superman has REALLY thick plot armour.