Exciting new ideas

I came up with an entirely new direction for the middle portion of my novel, and it also gives my antagonist something more interesting to do. Actually, it's based on a concept I've been wanting to work into a story for some time, but couldn't find the appropriate venue for it. Well, now I have it. My current draft will require a fair amount of rewriting; the change will, in fact, affect the whole tone and direction of the book. But it will make it far stronger as well. Now I've got that rush of excitement that comes with a new idea. So much to do!