Well......aside from Hulk and Juggy combo dominating just threw physical force like none other. I dont want to leave my fellow Venomfan's hanging so Im going to go with an very obsured but somewhat conceivable outcome............... behold.........
Venom due too his past expirance with the two powerhouse realizes they cant win and with a quick Symbitoe to sybmitoe huddle the three decide well why dont we make one kill the other?
Carnage, Toxin and Venom leap onto Hulk like Venom did in the one shot and drive him uber crazy, and further dig into his brain on a molecular level and with Carnages signature nightmare inducing ability they push Hulk into a fury so destructive he tears into Juggernaut somewhat similar to what Onslaught did rips out the jem and bam Jugg's is dead...or not who knows point is they are fighting
Sure some of you may think a symbiote couldnt posse's Hulk but in the what if? it possed him and Thor, and that Carnage has taken over the Surfer. again you may see that as immposible but keep in mind symbiotes are very persausive once latched onto someone, and yes that does include Hulk.
carnage's nightmare ability can be seen in....
"Carnage: Mindbomb"
possesing of Hulk in....
"what if? #4 WI the sybmiote suit had possed spiderman?"
Sybmiotes breaking down to a molecular level can be seen in...
"Venom: Carnage unleashed"
Carnage taking the sufer can be seen in....
amazing spiderman #430 & #431 "Cosmic Carnage"
and What If? #108 "What if the Avengers & Spider-Man fought the Cosmic Carnage?"
just an after thought