Everybody wants to see the two biggest, baddest "Jeopardy!" studs JAMES HOLZHAUER and KEN JENNINGS throw down.And Ken is down for it. On "Good Morning America" yesterday, he said, quote, "It's gotta be inevitable.But 'Jeopardy!' only does those special tournaments every so often . . . And obviously I can't get 29-year-old Ken to show up with his sleek, 29-year-old brain, it's got to be me with my broke-down brain." One expert says James will get barely half that.Federal and California taxes will trim his net winnings to $1.29 million, a 47.6% cut.Of course, $1.29 million in cash is nothing to cry about, either. And finally, Emma Boettcher, the woman who took down James on Monday's episode, was dethroned last night after three straight victories.