ummmmm ok.
a pissed of venom took a sonic gun full yeild and then blasted by human torch, he then preceded to beat the tar out of spidey while he quelled the torches flame and then nearly drowned him,,,,,,,,this was before the venom upgrade in "madness" it's been suggested that he retained some of his upgrades,,,,,,muchless the serious upgrades that he underwent during his own comic run.........Sonic guns do little than piss him off anymore in a big way. He's physically much much stronger. He has new mental abilites where he can retain a person's entire life experience through a single touch, he's practically about as tangible as liquid metal. he can go stealth.
Carnage? it took the combined powers of venom, spiderman, and some of the "greatest superheroes" to beat him. Carnage is stronger, faster, and can launch his own projectiles.
Venom took down the entire jury (who were armed to the teeth with sonics, explosives, and augmented strength) and then went on to kick spidey's ass as well as a huge alien-like monster while being burned by fire.
I see how iron man aand wm would stand a very good chance against these two,,,however I really don't think their going to win.