Chissler, the black suit is from the comics.
Here's what happened, umbrax can probably fill the details that I've forgotten.
A long time ago there was a menace that threatened the entire world, and all the superheros of the Marvel Universe had to get together to defeat it.
This, of course, invovled them traveling to alien worlds and fighting the bad guys. Along the way, spider-man's costume got torn up big time.
Can't have a naked super-hero, so one of the super-aliens made him a new outfit from alien materials. It was the black outfit, with a white spider
on it and white eyes. It made him stronger and faster and his spidey sense was better and all that. Which was great. But then, after a while, he
came to realize that this suit was sort of....alive! It was an alien symbiont, and it was messing with his head. So finally he gets rid of it.
And so it would've ended, BUT, a newspaper photograhper (just like peter parker) named Eddie Brock, found the outifit, put it on, and got along with
the symbiont. Eddie Brock was a big guy, but he seemed to be jealous of peter parker, who'd allways get better spider-man picks. The symbiont was
hateful of peter parker too. So Brock learns from the symbiont that spider-man is
peter parker, and the hate of the two of them becomes one
all consuming hate. Eddie Brock becomes the super villian, Venom, sort of an 'evil spider-man'.
Most of spider-man's enemies have been 'evil opposites' of him, for what its worth. The Scorpion, he was made the same was as spider-man, to
counter him infact, but with a radioactive scorpion rather than a spider. The lizard, same idea, half-man, half-creppy crawly creature.
Venom somewho spawns off another symbiont super-villian, Carnage.
Venom is basically a super-crazy cracked out evil spiderman. He has all of spiderman's powers, but spidey can't detect him with his spidey sense.
And on top of that, the suit is alive, and it lets him change his appearance and also it moves like a weird liquid and can attack on its own.
And he drools a helluva lot.