Look, being creative isn't easy. It's not something you can turn on and off at will, and it can be harder if you're expected to perform on demand. In short, creativity is pretty much like sex -- and like sex, sometimes everything goes swimmingly, and sometimes you can only think back to good old times. These creators didn't just think back -- they brought the good old times to the present by creating the same things again. Hey, if they worked once, they might very well work again, right?