Is there an Antichrist alive today?

Woo boy! This is an interesting proposition. Today I read a book called The Copper Scroll. It was fiction, but it, like the four books preceding it, talks a lot about prophecy. There was a paragraph that caught my eye. Please keep in mind that the following is fiction, but it's an interesting thought nonetheless.

"...Since nobody knows when Jesus is going to return - Jesus said even He didn't know; He said only His Father knew - that would mean that Satan doesn't know either. Which means Satan has always had to be prepared for any eventuality. That means that for almost two thousand years, he's had to have at least one antichrist on the earth, in position, ready to go, in every generation since the resurrection."

So how 'bout that, huh? It's a strange thought, but couldn't it be true?