Anatoli Knyazev (I have no idea how to pronounce that) was a cybernetically enhanced KGB assassin sent to the US to stop the Star Wars program Reagan was pushing in the 80s. When Batman had him as good as captured with a batarang line wrapped around KGBeast's wrist, the Beast did what any good solider would -- he chopped off his own hand. Naturally, since comic book characters in the late 80s and early 90s loved this kind of thing, he replaced his missing hand with a giant gun. Since the fall of the Soviet Union, he's usually just referred to as "The Beast," but I still like to call him KGBeast. It's a funny name.
Pros: KGBeast is a funny name?
Cons: KGBeast is a funny name. Also, everything else.
The gun on the arm is great for camp like Machine Girl, but awful in the Batman Begins context.
How I'd do it: I wouldn't in a million years.
Casting Guesses: Vin Diesel with a horrible Russian accent? But this is a villain from another time, he might have fit in the Joel Schumacher Batman movies if they'd been made in the late 80s, and he would've been played by Dolph Lundgren. Or maybe that guy who lip synched to Gene Hackman's voice in Superman IV.
Verdict: Easily the worst one I've covered yet. Compared to KGBeast, Calendar Man looks like a great idea.
After The Scarecrow, Ra's Al Ghul, The Joker, and Two-Face, who should be Batman's next enemy in the Batman Begins/The Dark Knight series? Well, as of now we know that Tom Hardy will play Bane and Anne Hathaway will play Catwoman.
Check out the master list for all the villains covered. I've pretty much run out by now. Obviously, there are more Batman villains, but not any of significance that I know of. As of February 2009, no one is confirmed as a villain. Not the Johnny Depp Riddler, not Phillip Seymour Hoffman Penguin, nobody.