Bringing in the Goblins is a great example. Scorpion may not exactly be an actual copy of the Lizard, but to use Scorpion in a sequel right after we've seen Lizard would just be in awful taste because it's still a villain with a tail in its essential. Sure, Scorpion can shoot acid from that tail, but it's still something we've seen in the form of the movie beforehand with a villain WITH A TAIL. That is why it's stupid, not what Scorpion is, but just for the fact that he's a villain with a tail which is what Spidey has faced before. If Scorpion shows up in like part three or four or whatever, then that's fine...but for to be in an installment right after Lizard makes it completely silly.
And you're totally misunderstanding my point if you think I meant the general audience wouldn't get that he's a scorpion and Connors was a lizard; that was not my point obviously. The GA isn't that stupid, but they will also think it's silly if Webb uses Scorpion as the villain for Amazing Spider-Man 2. Please, understand what I am getting at, which some of the posters above do, and don't bring in silly remarks as those last two sentences or so about other animals having tails too